Android——数据存储（四种方式之二）读写SD卡——练习
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Android——数据存储（四种方式之二）读写SD卡——练习
1保存到SDK ——字符串方式
<span style="font-size:18px;"><strong>package com.example.jreduch08.SDK;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.os.Environment;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.CheckBox;import android.widget.TextView;import android.widget.Toast;import com.example.jreduch08.R;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;public class SdActivity extends AppCompatActivity {private CheckBox c1,c2,c3,c4,c5,c6; private Button bt0, bt1,bt2; private TextView tv3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.setting); getSupportActionBar().hide(); c1= (CheckBox) findViewById(R.id.c1); c2= (CheckBox) findViewById(R.id.c2); c3= (CheckBox) findViewById(R.id.c3); c4= (CheckBox) findViewById(R.id.c4); c5= (CheckBox) findViewById(R.id.c5); c6= (CheckBox) findViewById(R.id.c6); bt0= (Button) findViewById(R.id.bt0); bt1= (Button) findViewById(R.id.bt1); bt2= (Button) findViewById(R.id.bt2); tv3= (TextView) findViewById(R.id.tv3); bt2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { AlertDialog.Builder builder=new AlertDialog.Builder(SdActivity.this); builder.setTitle("字体大小请选择"); builder.setIcon(R.mipmap.ic_launcher); final String[] items={"大","中","小"}; // builder.setMultiChoiceItems()多选 builder.setSingleChoiceItems(items, 1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int i) { Toast.makeText(getBaseContext(), items[i].toString(), Toast.LENGTH_SHORT).show(); tv3.setText(items[i].toString()); dialog.dismiss(); } }); builder.setCancelable(false); AlertDialog alertDialog=builder.create(); alertDialog.show(); } }); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { saveFile(); } }); bt0.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent=new Intent(SdActivity.this,ShowActivity.class); startActivity(intent); } }); } //保存文件到SD卡 public void saveFile(){ FileOutputStream fos=null; //获取SD卡状态 String state= Environment.getExternalStorageState(); //判断SD卡是否就绪 if(!state.equals(Environment.MEDIA_MOUNTED)){ Toast.makeText(this,"请检查SD卡",Toast.LENGTH_SHORT).show(); return; } //取得SD卡根目录 File file= Environment.getExternalStorageDirectory(); try { Log.d("=====SD卡根目录：",file.getCanonicalPath().toString());// File myFile=new File(file.getCanonicalPath()+"/sd.txt");// fos=new FileOutputStream(myFile); //输出流的构造参数1可以是 File对象 也可以是文件路径 //输出流的构造参数2：默认为False=>覆盖内容；ture=》追加内容 //追加 ，ture fos=new FileOutputStream(file.getCanonicalPath()+"/sd.txt"); String str="列表是否显示摘要:"+c1.isChecked()+":字体大小:"+tv3.getText().toString() +":推送通知:"+c2.isChecked()+":互动插件:"+c3.isChecked() +":自动优化阅读:"+c4.isChecked()+":收藏时转发:"+c5.isChecked() +":顶踩时转发:"+c6.isChecked(); fos.write(str.getBytes()); Toast.makeText(this,"保存成功",Toast.LENGTH_SHORT).show(); } catch (IOException e) { e.printStackTrace(); }finally { if (fos!=null){ try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } } } @Override protected void onStart() { super.onStart(); String str=readFile(); String str1[]=str.split(":"); c1.setChecked(Boolean.parseBoolean(str1[1])); c2.setChecked(Boolean.parseBoolean(str1[5])); c3.setChecked(Boolean.parseBoolean(str1[7])); c4.setChecked(Boolean.parseBoolean(str1[9])); c5.setChecked(Boolean.parseBoolean(str1[11])); c6.setChecked(Boolean.parseBoolean(str1[13])); } //从SD卡读取文件 public String readFile(){ BufferedReader reader=null; FileInputStream fis=null; StringBuilder sbd=new StringBuilder(); String statu= Environment.getExternalStorageState(); if (!statu.equals(Environment.MEDIA_MOUNTED)){ Toast.makeText(this,"SD卡未就绪",Toast.LENGTH_SHORT).show(); return ""; } File root=Environment.getExternalStorageDirectory(); try { fis=new FileInputStream(root+"/sd.txt"); reader= new BufferedReader(new InputStreamReader(fis)); String row=""; try { while ((row=reader.readLine())!=null){ sbd.append(row); } } catch (IOException e) { e.printStackTrace(); } } catch (FileNotFoundException e) { Toast.makeText(this,"文件不存在",Toast.LENGTH_SHORT).show(); e.printStackTrace(); }finally { if (reader!=null){ try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return sbd.toString(); }}</strong></span><span style="font-size:18px;"><strong><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"><LinearLayout android:layout_width="match_parent" android:layout_height="50dp" android:orientation="horizontal" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="读取" android:id="@+id/bt0" android:background="#feffff"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设置" android:textSize="30sp" android:layout_marginLeft="80dp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="意见反馈" android:id="@+id/bt1" android:background="#feffff" android:layout_marginLeft="50dp" /></LinearLayout> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_horizontal"></LinearLayout> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="列表显示摘要" android:textSize="25sp" /> <CheckBox android:id="@+id/c1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="25sp" android:layout_marginLeft="150dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="字体大小" android:textSize="25sp" /> <TextView android:id="@+id/tv3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="中" android:textSize="25sp" android:layout_marginLeft="205dp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=">" android:textSize="30sp" android:id="@+id/bt2" android:background="#feffff"/> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="列表页评论" android:textSize="25sp" /> <TextView android:id="@+id/tv5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="不限 >" android:textSize="25sp" android:layout_marginLeft="153dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv6" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="2G/3G网络流量" android:textSize="25sp" /> <TextView android:id="@+id/tv7" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="较省流量（普通下载）>" android:textSize="15sp" android:layout_marginLeft="15dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv8" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="清理缓存" android:textSize="25sp" /> <TextView android:id="@+id/tv9" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="当前缓存：2.48MB>" android:textSize="20sp" android:layout_marginLeft="70dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv10" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="推送通知" android:textSize="25sp" /> <CheckBox android:id="@+id/c2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="200dp" android:checked="true" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv11" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="互动插件" android:textSize="25sp" /> <CheckBox android:id="@+id/c3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="200dp" android:checked="true" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv12" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="自动优化阅读" android:textSize="25sp" /> <CheckBox android:id="@+id/c4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="152dp" android:checked="true" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv13" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="收藏时转发" android:textSize="25sp" /> <CheckBox android:id="@+id/c5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="175dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv14" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="顶踩时转发" android:textSize="25sp" /> <CheckBox android:id="@+id/c6" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="175dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> </LinearLayout></ScrollView></LinearLayout></strong></span>
package com.example.jreduch08.SDK;import android.os.Bundle;import android.os.Environment;import android.support.v7.app.AppCompatActivity;import android.widget.TextView;import android.widget.Toast;import com.example.jreduch08.R;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStreamReader;public class ShowActivity extends AppCompatActivity { private TextView show; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_show); show= (TextView) findViewById(R.id.show); show.setText(readFile()); } //从SD卡读取文件 public String readFile(){ BufferedReader reader=null; FileInputStream fis=null; StringBuilder sbd=new StringBuilder(); String statu= Environment.getExternalStorageState(); if (!statu.equals(Environment.MEDIA_MOUNTED)){ Toast.makeText(this,"SD卡未就绪",Toast.LENGTH_SHORT).show(); return ""; } File root=Environment.getExternalStorageDirectory(); try { fis=new FileInputStream(root+"/sd.txt"); reader= new BufferedReader(new InputStreamReader(fis)); String row=""; try { while ((row=reader.readLine())!=null){ sbd.append(row); } } catch (IOException e) { e.printStackTrace(); } } catch (FileNotFoundException e) { Toast.makeText(this,"文件不存在",Toast.LENGTH_SHORT).show(); e.printStackTrace(); }finally { if (reader!=null){ try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } return sbd.toString(); }}<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.jreduch08.SDK.ShowActivity"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/show" android:textSize="20sp" android:text="读取结果显示" /></RelativeLayout>
保存到SDK——对象 类
package com.example.jreduch08.entity;import java.io.Serializable;/** * Created by 冲天之峰 on 2016/8/16. */public class Settings implements Serializable { private boolean c1; private boolean c2; private boolean c3; private boolean c4; private boolean c5; private boolean c6; private String textsize; public Settings(String textsize, boolean c6, boolean c5, boolean c4, boolean c3, boolean c2, boolean c1) { this.textsize = textsize; this.c6 = c6; this.c5 = c5; this.c4 = c4; this.c3 = c3; this.c2 = c2; this.c1 = c1; } public boolean isC1() { return c1; } public void setC1(boolean c1) { this.c1 = c1; } public boolean isC2() { return c2; } public void setC2(boolean c2) { this.c2 = c2; } public boolean isC3() { return c3; } public void setC3(boolean c3) { this.c3 = c3; } public boolean isC4() { return c4; } public void setC4(boolean c4) { this.c4 = c4; } public boolean isC5() { return c5; } public void setC5(boolean c5) { this.c5 = c5; } public boolean isC6() { return c6; } public void setC6(boolean c6) { this.c6 = c6; } public String getTextsize() { return textsize; } public void setTextsize(String textsize) { this.textsize = textsize; } public Settings() { }}package com.example.jreduch08.entity;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.os.Environment;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.CheckBox;import android.widget.TextView;import android.widget.Toast;import com.example.jreduch08.R;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.StreamCorruptedException;public class DuixActivity extends AppCompatActivity { private CheckBox c1, c2, c3, c4, c5, c6; private Button bt0, bt1, bt2; private TextView tv3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_duix); getSupportActionBar().hide(); c1 = (CheckBox) findViewById(R.id.c1); c2 = (CheckBox) findViewById(R.id.c2); c3 = (CheckBox) findViewById(R.id.c3); c4 = (CheckBox) findViewById(R.id.c4); c5 = (CheckBox) findViewById(R.id.c5); c6 = (CheckBox) findViewById(R.id.c6); bt0 = (Button) findViewById(R.id.bt0); bt1 = (Button) findViewById(R.id.bt1); bt2 = (Button) findViewById(R.id.bt2); tv3 = (TextView) findViewById(R.id.tv3); bt2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { AlertDialog.Builder builder = new AlertDialog.Builder(DuixActivity.this); builder.setTitle("字体大小请选择"); builder.setIcon(R.mipmap.ic_launcher); final String[] items = {"大", "中", "小"}; // builder.setMultiChoiceItems()多选 builder.setSingleChoiceItems(items, 1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int i) { Toast.makeText(getBaseContext(), items[i].toString(), Toast.LENGTH_SHORT).show(); tv3.setText(items[i].toString()); dialog.dismiss(); } }); builder.setCancelable(false); AlertDialog alertDialog = builder.create(); alertDialog.show(); } }); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Settings sets = new Settings(); sets.setC1(c1.isChecked()); sets.setC2(c2.isChecked()); sets.setC3(c3.isChecked()); sets.setC4(c4.isChecked()); sets.setC5(c5.isChecked()); sets.setC6(c6.isChecked()); sets.setTextsize(tv3.getText().toString()); String state = Environment.getExternalStorageState(); if (!state.equals(Environment.MEDIA_MOUNTED)) { Toast.makeText(getBaseContext(), "请检查SD卡", Toast.LENGTH_SHORT).show(); return; } File root = Environment.getExternalStorageDirectory(); FileOutputStream fos = null; ObjectOutputStream oos = null; try { fos = new FileOutputStream(root + "/ttings.txt"); oos = new ObjectOutputStream(fos); oos.writeObject(sets); Toast.makeText(getBaseContext(), "保存成功", Toast.LENGTH_SHORT).show(); } catch (IOException e) { e.printStackTrace(); } finally { if (oos != null) { try { oos.close(); } catch (IOException e) { e.printStackTrace(); } } } } }); bt0.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent=new Intent(DuixActivity.this,Show1Activity.class); startActivity(intent); } }); } @Override protected void onStart() { super.onStart(); readSettings(); } public void readSettings() { File root = Environment.getExternalStorageDirectory(); FileInputStream fis = null; ObjectInputStream ois = null; try { fis = new FileInputStream(root+ "/ttings.txt"); ois = new ObjectInputStream(fis); Settings sets = (Settings) ois.readObject(); tv3.setText(sets.getTextsize()); c1.setChecked(sets.isC1()); c2.setChecked(sets.isC2()); c3.setChecked(sets.isC3()); c4.setChecked(sets.isC4()); c5.setChecked(sets.isC5()); c6.setChecked(sets.isC6()); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (StreamCorruptedException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } finally { if (ois != null) { try { ois.close(); } catch (IOException e) { e.printStackTrace(); } } } }}<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="50dp" android:orientation="horizontal" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="读取" android:id="@+id/bt0" android:background="#feffff"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设置" android:textSize="30sp" android:layout_marginLeft="80dp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="意见反馈" android:id="@+id/bt1" android:background="#feffff" android:layout_marginLeft="50dp" /> </LinearLayout> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_horizontal"></LinearLayout> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="列表显示摘要" android:textSize="25sp" /> <CheckBox android:id="@+id/c1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="25sp" android:layout_marginLeft="150dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="字体大小" android:textSize="25sp" /> <TextView android:id="@+id/tv3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="中" android:textSize="25sp" android:layout_marginLeft="205dp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=">" android:textSize="30sp" android:id="@+id/bt2" android:background="#feffff"/> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="列表页评论" android:textSize="25sp" /> <TextView android:id="@+id/tv5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="不限 >" android:textSize="25sp" android:layout_marginLeft="153dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv6" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="2G/3G网络流量" android:textSize="25sp" /> <TextView android:id="@+id/tv7" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="较省流量（普通下载）>" android:textSize="15sp" android:layout_marginLeft="15dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv8" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="清理缓存" android:textSize="25sp" /> <TextView android:id="@+id/tv9" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="当前缓存：2.48MB>" android:textSize="20sp" android:layout_marginLeft="70dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv10" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="推送通知" android:textSize="25sp" /> <CheckBox android:id="@+id/c2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="200dp" android:checked="true" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv11" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="互动插件" android:textSize="25sp" /> <CheckBox android:id="@+id/c3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="200dp" android:checked="true" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv12" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="自动优化阅读" android:textSize="25sp" /> <CheckBox android:id="@+id/c4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="152dp" android:checked="true" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv13" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="收藏时转发" android:textSize="25sp" /> <CheckBox android:id="@+id/c5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="175dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" android:layout_marginBottom="10dp" > <TextView android:id="@+id/tv14" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="顶踩时转发" android:textSize="25sp" /> <CheckBox android:id="@+id/c6" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="175dp" /> </LinearLayout> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#a9a8a8" ></View> </LinearLayout> </ScrollView></LinearLayout>
package com.example.jreduch08.entity;import android.os.Bundle;import android.os.Environment;import android.support.v7.app.AppCompatActivity;import android.widget.TextView;import com.example.jreduch08.R;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.ObjectInputStream;import java.io.StreamCorruptedException;public class Show1Activity extends AppCompatActivity { private TextView show; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_show1); show= (TextView) findViewById(R.id.show); readSettings(); } public void readSettings() { File root = Environment.getExternalStorageDirectory(); FileInputStream fis = null; ObjectInputStream ois = null; try { fis = new FileInputStream(root+ "/ttings.txt"); ois = new ObjectInputStream(fis); Settings sets = (Settings) ois.readObject(); show.setText(sets.getTextsize()+sets.isC1()+sets.isC2()+sets.isC3()+sets.isC4() +sets.isC5()+sets.isC6()); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (StreamCorruptedException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } finally { if (ois != null) { try { ois.close(); } catch (IOException e) { e.printStackTrace(); } } } }}<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.jreduch08.SDK.ShowActivity"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/show" android:textSize="20sp" android:text="读取结果显示" /></RelativeLayout>
内存储——SharePreference
package com.example.jreduch08.Sharepreferences;import android.content.DialogInterface;import android.content.SharedPreferences;import android.os.Bundle;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.CheckBox;import android.widget.TextView;import android.widget.Toast;import com.example.jreduch08.R;public class SharePreferenceZyfActivity extends AppCompatActivity { private CheckBox c1,c2,c3,c4,c5,c6; private Button bt0, bt1,bt2; private TextView tv3,show; private SharedPreferences sp; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_share_preference_zyf); getSupportActionBar().hide(); c1= (CheckBox) findViewById(R.id.c1); c2= (CheckBox) findViewById(R.id.c2); c3= (CheckBox) findViewById(R.id.c3); c4= (CheckBox) findViewById(R.id.c4); c5= (CheckBox) findViewById(R.id.c5); c6= (CheckBox) findViewById(R.id.c6); bt0= (Button) findViewById(R.id.bt0); bt1= (Button) findViewById(R.id.bt1); bt2= (Button) findViewById(R.id.bt2); tv3= (TextView) findViewById(R.id.tv3); show= (TextView) findViewById(R.id.show); bt2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { AlertDialog.Builder builder=new AlertDialog.Builder(SharePreferenceZyfActivity.this); builder.setTitle("字体大小请选择"); builder.setIcon(R.mipmap.ic_launcher); final String[] items={"大","中","小"}; // builder.setMultiChoiceItems()多选 builder.setSingleChoiceItems(items, 1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int i) { Toast.makeText(getBaseContext(), items[i].toString(), Toast.LENGTH_SHORT).show(); tv3.setText(items[i].toString()); dialog.dismiss(); } }); builder.setCancelable(false); AlertDialog alertDialog=builder.create(); alertDialog.show(); } }); //读取 SharePreference sp=getSharedPreferences("userInfo",MODE_PRIVATE); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //保存数据到SharePreference SharedPreferences.Editor editor=sp.edit(); editor.putString("text",tv3.getText().toString()); editor.putBoolean("cc1",c1.isChecked()); editor.putBoolean("cc2",c2.isChecked()); editor.putBoolean("cc3",c3.isChecked()); editor.putBoolean("cc4",c4.isChecked()); editor.putBoolean("cc5",c5.isChecked()); editor.putBoolean("cc6",c6.isChecked()); editor.commit(); } }); } public void setSettings(){ Boolean ccc1=sp.getBoolean("cc1",false); Boolean ccc2=sp.getBoolean("cc2",false); Boolean ccc3=sp.getBoolean("cc3",false); Boolean ccc4=sp.getBoolean("cc4",false); Boolean ccc5=sp.getBoolean("cc5",false); Boolean ccc6=sp.getBoolean("cc6",false); String text1=sp.getString("text","中"); c1.setChecked(ccc1); c2.setChecked(ccc2); c3.setChecked(ccc3); c4.setChecked(ccc4); c5.setChecked(ccc5); c6.setChecked(ccc6); tv3.setText(text1); } @Override protected void onStart() { super.onStart(); setSettings(); }}
解析JSON
//json对应json数据中的{ } 大括号JSONObject obj=new JSONObject(sbd.toString());//json数值对应json数据中的【】 中括号JSONArray ja=obj.getJSONArray("data");package com.example.jreduch08;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;public class PaserJsonActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_paser_json); StringBuilder sbd=new StringBuilder(); BufferedReader reader=null; InputStream is=null; try { is=getResources().getAssets().open("cityinfo2.txt"); reader=new BufferedReader(new InputStreamReader(is)); String row=""; while ((row=reader.readLine())!=null){ sbd.append(row); // sbd.append("\n"); } try { //json对应json数据中的{ } 大括号 JSONObject obj=new JSONObject(sbd.toString()); //json数值对应json数据中的【】 中括号 JSONArray ja=obj.getJSONArray("data"); for (int i=0;i<ja.length();i++){ JSONObject jo=(JSONObject) ja.get(i); if (jo.has("name")){ String name=jo.getString("name"); Log.d("====",name); } } } catch (JSONException e) { e.printStackTrace(); } } catch (IOException e) { e.printStackTrace(); }finally { if (reader!=null){ try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } }}
package com.example.jreduch08.Sharepreferences;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import com.example.jreduch08.R;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;public class PaserJson2Activity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_paser_json2); StringBuilder sbd=new StringBuilder(); BufferedReader reader=null; InputStream is=null; try { is=getResources().getAssets().open("jsonNews.txt"); reader=new BufferedReader(new InputStreamReader(is)); String row=""; while ((row=reader.readLine())!=null){ sbd.append(row); // sbd.append("\n"); } try { //json对应json数据中的{ } 大括号 JSONObject obj = new JSONObject(sbd.toString()); //json数值对应json数据中的【】 中括号 JSONObject ja = obj.getJSONObject("showapi_res_body"); JSONObject ja1 = ja.getJSONObject("pagebean"); JSONArray ja2 = ja1.getJSONArray("contentlist"); for (int k = 0; k < ja2.length(); k++) { JSONObject jo = (JSONObject) ja2.get(k); if (jo.has("content")) { String content = jo.getString("content"); Log.d("====", content); } } } catch (JSONException e) { e.printStackTrace(); } } catch (IOException e) { e.printStackTrace(); }finally { if (reader!=null){ try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } } }}
3 0
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