Android实现网络图片查看器

来源：互联网发布：网络平台代理合同编辑：程序博客网时间：2024/06/12 21:01

Android实现从互联网上获取图片

效果图如下：

xml:

 <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:hint="请输入图片的地址" />    <Button        android:id="@+id/btnView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:background="@drawable/button_bg"        android:onClick="viewImage"        android:text="浏览" />

java代码：

public class MainActivity extends Activity {    private EditText etImageUrl;    private ImageView ivImage;    public 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;ivImage.setImageBitmap(bitmap);break;default:break;}    };    };@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initViews();}private void initViews() {   etImageUrl=(EditText) findViewById(R.id.etImageUrl);   ivImage=(ImageView) findViewById(R.id.ivImage);}@Overridepublic 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 viewImage(View view){final String imageUrl=etImageUrl.getText().toString();if(TextUtils.isEmpty(imageUrl)){Toast.makeText(this, "图片路径不能为空", Toast.LENGTH_LONG).show();}else{new Thread(){public void run() {try {URL url=new URL(imageUrl);HttpURLConnection httpURLConnection=(HttpURLConnection) url.openConnection();    httpURLConnection.setRequestMethod("GET");    httpURLConnection.setConnectTimeout(5000);    int responseCode=httpURLConnection.getResponseCode();    if(responseCode==200){    InputStream inputStream=httpURLConnection.getInputStream();    Bitmap bitmap=BitmapFactory.decodeStream(inputStream);    Message message=new Message();    message.what=SHOWIMAGE;    message.obj=bitmap;    //ivImage.setImageBitmap(bitmap);    handler.sendMessage(message);    }else{    Toast.makeText(MainActivity.this, "显示图片失败", Toast.LENGTH_LONG).show();    }} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}.start();}}}

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