网页图片查看器

来源：互联网发布：印度出口粮食知乎编辑：程序博客网时间：2024/05/16 15:53

实验效果：

主要代码：

MainActivity.java

package com.example.androidwebpicture;import Java.io.IOException;import java.io.InputStream;import java.NET.HttpURLConnection;import java.Net.MalformedURLException;import java.net.URL;import javax.crypto.spec.IvParameterSpec;import Android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.text.TextUtils;import android.view.Menu;import android.view.View;import android.widget.EditText;import android.widget.ImageView;import android.widget.Toast;public class MainActivity extends Activity {   private EditText etUrl;   private ImageView ivImageShow;   private static final int SHOWIMAGE=1;   private Handler handler=new Handler(){    public void handleMessage(android.os.Message msg) {     switch (msg.what) {  case SHOWIMAGE:   Bitmap bitmap=(Bitmap) msg.obj;   ivImageShow.setImageBitmap(bitmap);      break;  default:   break;  }    };   }; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  initViews(); } private void initViews() {  etUrl=(EditText) findViewById(R.id.etImageUrl);  ivImageShow=(ImageView) findViewById(R.id.ivImage); } @Override public boolean onCreateOptionsMenu(Menu menu) {  // Inflate the menu; this adds items to the action bar if it is present.  getMenuInflater().inflate(R.menu.main, menu);  return true; }    public void showImage(View view){     final String path=etUrl.getText().toString();     if(TextUtils.isEmpty(path)){      Toast.makeText(this, "图片不能为空", Toast.LENGTH_LONG).show();     }else{      new Thread(){       public void run(){        try {         URL url=new URL(path);         HttpURLConnection connection=(HttpURLConnection) url.openConnection();         connection.setRequestMethod("GET");         connection.setConnectTimeout(5000);         int responseCode=connection.getResponseCode();         if(responseCode==200){          InputStream inputStream=connection.getInputStream();          Bitmap bitmap=BitmapFactory.decodeStream(inputStream);          //ivImageShow.setImageBitmap(bitmap);          Message message=new Message();          message.what=SHOWIMAGE;          message.obj=bitmap;          handler.sendMessage(message);         }        } catch (MalformedURLException e) {         e.printStackTrace();        } catch (IOException e) {         e.printStackTrace();        }       };      }.start();     }    }}

页面布局代码：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/LinearLayout1"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    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=".MainActivity" >     <ImageView        android:id="@+id/ivImage"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:layout_weight="1" />    <EditText        android:id="@+id/etImageUrl"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:ems="10"       android:text="http://imgsrc.baidu.com/forum/w%3D580/sign=60880cfd0cf41bd5da53e8fc61db81a0/396a7301213fb80e667a8a0134d12f2ebb3894c4.jpg"       />    <Button        android:id="@+id/btnView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:onClick="showImage"        android:text="浏览" /></LinearLayout>

0 0