android 自定义的AlertDialog强化版
来源：互联网 发布：windows内核编程有前景 编辑：程序博客网 时间：2024/06/05 15:20
上一篇文章http://blog.csdn.net/qq_33748378/article/details/54581422#comments介绍了自定义的AlertDialog,在此基础之上，再来看下常用的自定义的AlertDialog。
ItemDialog:
首先来看下android原生的itemDialog
package com.example.yk.dialogtest;import android.content.DialogInterface;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.Toast;public class ItemDialogActivity extends AppCompatActivity { private String[] items={"a","b","c","d","e","d","f","g","h","i","j","k","l","m"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_item_dialog); AlertDialog.Builder alertDialog=new AlertDialog.Builder(this); alertDialog.setTitle("title"); alertDialog.setItems(items, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { Toast.makeText(ItemDialogActivity.this, "点击了"+items[i], Toast.LENGTH_SHORT).show(); } }); alertDialog.show(); }}效果如图：
自定义的itemDialog:
package com.example.yk.dialogtest;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;/** * Created by yk on 2017/1/17. */public class itemDialog extends Dialog implements AdapterView.OnItemClickListener { public interface OnDialogItemClickListener { /** * 点击item 事件的回调方法 * @param requestCode 用于区分某种情况下的showDialog * @param position * @param item */ void onDialogItemClick(int requestCode, int position,String item); } private String title; private Context context; private String[] items; private int requestCode; private OnDialogItemClickListener listener; public itemDialog(Context context, String title, String[] items, int requestCode, OnDialogItemClickListener listener) { super(context, R.style.MyDialog); this.context=context; this.title=title; this.items=items; this.requestCode=requestCode; this.listener=listener; } private TextView textView; private ListView listView; private ArrayAdapter<String> adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.item_dialog); textView = (TextView) findViewById(R.id.tvItemDialogTitle); listView = (ListView) findViewById(R.id.lvItemDialog); adapter = new ArrayAdapter<String>(context, R.layout.item_dialog_activity,R.id.text_view, items); textView.setText(title); listView.setAdapter(adapter); listView.setOnItemClickListener(this); } @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { listener.onDialogItemClick(requestCode,i, adapter.getItem(i)); dismiss(); }}item_dialog布局文件：
<?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_margin="30dp" android:background="@drawable/edit_item_text_bg" android:layout_height="match_parent"> <TextView android:id="@+id/tvItemDialogTitle" android:textColor="@color/black" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:textSize="21sp" android:layout_margin="15dp" android:text="Title" /> <ListView android:id="@+id/lvItemDialog" android:layout_width="match_parent" android:layout_height="wrap_content" android:divider="@color/gray_4" android:dividerHeight="1px" /></LinearLayout>MyDialog style:
<style name="MyDialog"> <item name="android:windowBackground">@android:color/transparent</item> <item name="android:windowFrame">@null</item> <item name="android:windowNoTitle">true</item> <item name="android:windowIsFloating">true</item> <item name="android:windowIsTranslucent">true</item> <item name="android:windowContentOverlay">@null</item> <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item> <item name="android:backgroundDimEnabled">true</item> </style>item_dialog_activity布局文件：
<?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"> <TextView android:layout_width="match_parent" android:layout_height="40dp" android:padding="10dp" android:id="@+id/text_view" android:gravity="center"/></LinearLayout>
package com.example.yk.dialogtest;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Toast;public class CustomItemDialog extends AppCompatActivity implements itemDialog.OnDialogItemClickListener { private static final int REQUEST_CODE_SECOND = 2; private String[] items={"a","b","c","d","e","d","f","g","h","i","j","k","l","m"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_custom_item_dialog); itemDialog itemDialog=new itemDialog(this,"title",items,REQUEST_CODE_SECOND,this); itemDialog.show(); } @Override public void onDialogItemClick(int requestCode, int position, String item) { if(requestCode==REQUEST_CODE_SECOND){ Toast.makeText(this, item, Toast.LENGTH_SHORT).show(); } }}效果图：
EditDialog:
editDialog中代码：
package com.example.yk.dialogtest;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.text.TextUtils;import android.view.View;import android.view.inputmethod.InputMethodManager;import android.widget.EditText;import android.widget.TextView;/** * Created by yk on 2017/1/18. */public class EditDialog extends Dialog implements View.OnClickListener { public interface OnDialogButtonClickListener{ void onDialogButtonClick(int requestCode,boolean isPositiveBtn,String s); } private String title; private String strPositive; private String strNegative; private int requestCode; private Context context; private OnDialogButtonClickListener listener; public EditDialog(Context context,String title,String strNegative,String strPositive,int requestCode,OnDialogButtonClickListener listener) { super(context,R.style.MyDialog); this.context=context; this.title=title; this.strNegative=strNegative; this.strPositive=strPositive; this.requestCode=requestCode; this.listener=listener; } private TextView tvTitle,tvCancel,tvConfirm; private EditText etInput; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_edit_dialog); tvTitle= (TextView) findViewById(R.id.tv_title); tvCancel= (TextView) findViewById(R.id.tv_cancel); tvConfirm= (TextView) findViewById(R.id.tv_confirm); etInput= (EditText) findViewById(R.id.edit_text); tvTitle.setText(title); if(TextUtils.isEmpty(tvConfirm.getText().toString().trim())){ tvCancel.setVisibility(View.GONE); }else { tvCancel.setVisibility(View.VISIBLE); } tvCancel.setOnClickListener(this); tvConfirm.setOnClickListener(this); tvTitle.postDelayed(new Runnable() { @Override public void run() { showSoftKeyBoard();//弹出输入键盘 } },100); } public void showSoftKeyBoard(){ InputMethodManager manager= (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); manager.toggleSoftInput(0,InputMethodManager.HIDE_NOT_ALWAYS); } @Override public void onClick(View view) { switch (view.getId()){ case R.id.tv_confirm: //点击确定按钮 listener.onDialogButtonClick(requestCode,true,etInput.getText().toString().trim()); break; case R.id.tv_cancel: //点击取消按钮 listener.onDialogButtonClick(requestCode,false,null); break; } dismiss(); }}layout_edit_dialog布局文件：<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="250dp" android:layout_height="wrap_content" android:layout_margin="50dp" android:background="@drawable/edit_item_text_bg" android:orientation="vertical"> <TextView android:id="@+id/tv_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="title" android:gravity="center" android:textSize="28sp" android:layout_marginTop="5dp" android:layout_marginBottom="5dp" android:paddingTop="3dp" android:paddingBottom="3dp" android:textAllCaps="false"/> <EditText android:id="@+id/edit_text" android:singleLine="true" android:inputType="numberDecimal" android:textSize="25sp" android:paddingTop="3dp" android:paddingBottom="3dp" android:layout_marginBottom="5dp" android:layout_width="match_parent" android:layout_height="wrap_content"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:id="@+id/tv_cancel" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:text="取消" android:background="@drawable/bg_item_to_alpha" android:textSize="20sp"/> <View android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/gray_3"/> <TextView android:id="@+id/tv_confirm" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:text="确定" android:textColor="@color/black" android:textSize="20sp"/> </LinearLayout></LinearLayout>drawable/bg_item_to_alpha：
<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:drawable="@color/alpha_1" android:state_pressed="true"/> <item android:drawable="@color/alpha_1" android:state_focused="true"/></selector>
drawable/edit_item_text_bg：
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <!--定义填充颜色--> <solid android:color="#ffffff"/> <!--定义四个角的圆角半径--> <corners android:radius="2dp"/></shape>
MianActivity中代码：
package com.example.yk.dialogtest;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Toast;public class EditDialogActivity extends AppCompatActivity implements EditDialog.OnDialogButtonClickListener { private static final int REQUEST_CODE_THIRD = 3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_edit_dialog); EditDialog editDialog=new EditDialog(this,"title","取消","确定",REQUEST_CODE_THIRD,this); editDialog.show(); } @Override public void onDialogButtonClick(int requestCode, boolean isPositiveBtn, String s) { if(requestCode==REQUEST_CODE_THIRD){ if(isPositiveBtn){ Toast.makeText(this, "输入的内容："+s, Toast.LENGTH_SHORT).show(); }else { Toast.makeText(this, "点击了取消", Toast.LENGTH_SHORT).show(); } } }}
如果需要对editText输入的内容作限制，需要在EditDialog中添加如下代码：
CustomWatcher customWatcher=new CustomWatcher(); etInput.addTextChangedListener(customWatcher);CustomWatcher:
private class CustomWatcher implements TextWatcher { @Override public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { } @Override public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { } @Override public void afterTextChanged(Editable editable) { String s = editable.toString(); /** * 不以小数点开头 */ if(s.length() ==1 && s.contains(".")){ editable.delete(0,1); return; } /** * 不能以00开头 */ if(s.startsWith("00")){ editable.delete(1,2); return; } /** * 整数部分最长为8位 */ if(!s.contains(".")){ if(s.length() == 9){ editable.delete(8,9); } return; } /** * 小数部分最多有2位 */ if(s.contains(".")){ int start = s.indexOf("." )+ 1; int end=s.length(); if(end-start>2){ editable.delete(start+2,s.length()); } return; } } }效果截图：
LoadProgressDialog:
LoadProgressDialog中代码：
package com.example.yk.dialogtest;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.widget.TextView;/** * Created by yk on 2017/1/18. */public class LoadProgressDialog extends Dialog{ private String message; private boolean canCancel; public LoadProgressDialog(Context context,String message,boolean canCancel) { super(context); this.message=message; this.canCancel=canCancel; } private TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_load_progress_dialog); textView= (TextView) findViewById(R.id.tv_message); setCancelable(canCancel); textView.setText(message); }}MainActivty中代码：package com.example.yk.dialogtest;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;public class LoadProgressActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_load_progress); LoadProgressDialog dialog=new LoadProgressDialog(this,"加载中",true); dialog.show(); }}R.layout.layout_load_progress_dialog为：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="280dp" android:layout_height="wrap_content" android:background="@drawable/edit_item_text_bg" android:orientation="vertical"> <TextView android:id="@+id/tv_message" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:layout_marginTop="5dp" android:layout_marginBottom="20dp" android:textSize="20sp"/> <ProgressBar android:id="@+id/progress_bar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center"/></LinearLayout>
在此基础之上，可以进一步添加自定义样式：
在LoadProgressDialog中改变的代码：
public LoadProgressDialog(Context context,String message,boolean canCancel) { super(context,R.style.easy_dialog_style); this.message=message; this.canCancel=canCancel; }自定义样式R.style.easy_dialog_style为：<style name="easy_dialog_style" parent="@android:style/Theme.Dialog"> <item name="android:windowFrame">@null</item> <!-- 边框 --> <item name="android:windowIsFloating">true</item> <!-- 是否浮现在activity之上 --> <item name="android:windowIsTranslucent">true</item> <!-- 半透明 --> <item name="android:windowNoTitle">true</item> <!-- 无标题 --> <item name="android:windowBackground">@color/transparent</item> <!-- 背景透明 --> <item name="android:backgroundDimEnabled">true</item> <!-- 后面的activity变暗 --> </style>R.layout.layout_load_progress_dialog布局为：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="280dp" android:layout_height="wrap_content" android:background="@drawable/edit_item_text_bg" android:orientation="vertical"> <TextView android:id="@+id/tv_message" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:layout_marginTop="5dp" android:layout_marginBottom="20dp" android:textSize="20sp"/> <ProgressBar android:id="@+id/progress_bar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingBottom="10dp" android:layout_gravity="center" android:indeterminateDrawable="@drawable/custom_progress_style"/></LinearLayout>drawable/custom_progress_style：<?xml version="1.0" encoding="utf-8"?><animated-rotate xmlns:android="http://schemas.android.com/apk/res/android" android:drawable="@mipmap/load_dialog" android:pivotX="50%" android:pivotY="50%"/>效果：
控制LoadProgressDialog显示与不显示的工具类:
LoadProgressActivity中代码：
package com.example.yk.dialogtest;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;public class LoadProgressActivity extends AppCompatActivity { private LoadProgressDialog dialog; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_load_progress);// dialog = new LoadProgressDialog(this,"加载中",true);// dialog.show(); LoadProgressUtil.showLoadProgressDialog(this,"加载中",true); }}LoadProgressUtil中代码：package com.example.yk.dialogtest;import android.content.Context;import android.util.Log;/** * Created by yk on 2017/1/18. */public class LoadProgressUtil { private static LoadProgressDialog loadProgressDialog; public static void showLoadProgressDialog(Context context,String title, boolean canCancel){ if(loadProgressDialog == null){ loadProgressDialog=new LoadProgressDialog(context,title,canCancel); }else { if(loadProgressDialog.isShowing()){ return; } }// Log.e("context",context.toString());// Log.e("loadProgressDialog",loadProgressDialog.getContext().toString()); loadProgressDialog.show(); } public static void cancelProgressDialog(){ if(loadProgressDialog==null){ return; }else { if(loadProgressDialog.isShowing()){ loadProgressDialog.dismiss(); }else { return; } } } public static void progressDialogIsShow(){ loadProgressDialog.isShowing(); }}如果像上面这样写的话，会发现，在第一次取消progressDialog，并且退出当前progressDialog所在的Activity，当第二次进入该progressDialog所在的Activity时是会报错的，错误原因：Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@3d4e7354 is not valid; is your activity running?查阅资料发现，对于AlertDialog来说，是需要依赖一个View，而View是对应于Activity的。那么为什么会报错呢，这里涉及到一个生命周期的问题了。静态变量private static LoadProgressDialog loadProgressDialog;需要等到系统GC的时候才会回收，第二次进入该activity时，此时的context是新的地址，而此时的progress Dialog的context还是上次的activity的，见下图：
解决的办法是：
package com.example.yk.dialogtest;import android.content.Context;import android.util.Log;/** * Created by yk on 2017/1/18. */public class LoadProgressUtil { private static LoadProgressDialog loadProgressDialog; public static void showLoadProgressDialog(Context context,String title, boolean canCancel){ if(loadProgressDialog == null){ loadProgressDialog=new LoadProgressDialog(context,title,canCancel); }else if(loadProgressDialog.getContext() !=context){ cancelProgressDialog(); loadProgressDialog=new LoadProgressDialog(context,title,canCancel); }// Log.e("context",context.toString());// Log.e("loadProgressDialog",loadProgressDialog.getContext().toString()); loadProgressDialog.show(); } public static void cancelProgressDialog(){ if(loadProgressDialog==null){ return; }else { if(loadProgressDialog.isShowing()){ loadProgressDialog.dismiss(); loadProgressDialog=null; } } } public static boolean progressDialogIsShow(){ return (loadProgressDialog !=null && loadProgressDialog.isShowing()); }}完整的项目源码：http://download.csdn.net/detail/qq_33748378/9740725
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