网站开发美工总结,邢台网站优化,wordpress上传音乐文件,wordpress安装悬浮qq在这里小编学习了查看网络图片的小案例,: 初始界面: 点击浏览后,效果如下: 需要注意的是 该案例需要获取联网权限,即: uses-permission android:nameandroid.permission.INTERNET/具体步骤如下: 1.定义并初始化控件: private EditText etImageUrl;private …在这里小编学习了查看网络图片的小案例,: 初始界面: 点击浏览后,效果如下: 需要注意的是 该案例需要获取联网权限,即: uses-permission android:nameandroid.permission.INTERNET/ 具体步骤如下: 1.定义并初始化控件: private EditText etImageUrl;private ImageView ivImage; /**控件初始化*/private void init() {ivImage (ImageView) findViewById(R.id.ivImage);etImageUrl (EditText) findViewById(R.id.etImageUrl);} 2.建立Handler对象: private Handler handler new Handler(){public void handleMessage(android.os.Message msg) {//对接收到的消息进行处理
// Looper.prepare();switch (msg.what) {case SHOW_IMAGE:Bitmap bitmap (Bitmap) msg.obj;//将OS流中的Object强制转换为Bitmap对象ivImage.setImageBitmap(bitmap);Toast toast Toast.makeText(MainActivity.this, 图片加载成功, Toast.LENGTH_SHORT);toast.setGravity(0, 0, 100);toast.show();break;default:break;}};}; 3.设置显示网络图片的方法: public void showImage(View view){//若在xml文件中使用onClick属性则其方法格式必须为 方法名View viewfinal String path etImageUrl.getText().toString();if (TextUtils.isEmpty(path)) {Toast.makeText(MainActivity.this, 图片路径不能为空, Toast.LENGTH_SHORT).show();} else {new Thread(){public void run(){//链接服务器请求获取图片try {URL url new URL(path);//发出http请求HttpURLConnection httpURLConnection (HttpURLConnection) url.openConnection();httpURLConnection.setRequestMethod(GET);//设置链接超时时间httpURLConnection.setConnectTimeout(5000);int responsecode httpURLConnection.getResponseCode();//获取响应码if (responsecode 200) {InputStream is httpURLConnection.getInputStream();//获取输入流Bitmap bitmap BitmapFactory.decodeStream(is);//2.告诉主线程帮我更新界面内容是BitmapMessage msg new Message();msg.what SHOW_IMAGE;msg.obj bitmap;handler.sendMessage(msg);}else{Toast toast Toast.makeText(MainActivity.this, 图片加载失败, Toast.LENGTH_SHORT);toast.setGravity(0, 0, 100);toast.show();}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}.start();//务必启动线程}} 至此,查看网络图片的小案例就完成了.转载于:https://www.cnblogs.com/toast/p/4650959.html
