Android使用线程获取网络图片的方法
本文为大家分享了Android使用线程获取网络图片的具体代码，供大家参考，具体内容如下
AndroidManifest.xml
<?xmlversion="1.0"encoding="utf-8"?> <manifestxmlns:android="http://schemas.android.com/apk/res/android" package="com.zdcrobot.handlermessage"> <uses-permissionandroid:name="android.permission.INTERNET"></uses-permission> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity" android:label="@string/app_name" android:theme="@style/AppTheme.NoActionBar"> <intent-filter> <actionandroid:name="android.intent.action.MAIN"/> <categoryandroid:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> </manifest>
activity_main.xml
<?xmlversion="1.0"encoding="utf-8"?> <android.support.design.widget.CoordinatorLayoutxmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:context="com.zdcrobot.handlermessage.MainActivity"> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="加载图片"/> <ImageView android:id="@+id/image1" android:layout_width="match_parent" android:layout_height="500dp"/> </LinearLayout> </android.support.design.widget.CoordinatorLayout>
MainActivity.class
packagecom.zdcrobot.handlermessage;
importandroid.graphics.Bitmap;
importandroid.graphics.BitmapFactory;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.support.v7.app.AppCompatActivity;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.ImageView;
importjava.io.IOException;
importjava.io.InputStream;
importjava.net.HttpURLConnection;
importjava.net.MalformedURLException;
importjava.net.URL;
publicclassMainActivityextendsAppCompatActivity{
privateButtonbutton;
privateImageViewimageView;
privateStringimagPath="http://pica.nipic.com/2007-11-09/200711912453162_2.jpg";
privatefinalintIS_FINISH=1;
privateHandlerhandler=newHandler(){
@Override
publicvoidhandleMessage(Messagemsg){
Bitmapbitmap=(Bitmap)msg.obj;
imageView.setImageBitmap(bitmap);
}
};
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button=(Button)findViewById(R.id.button1);
imageView=(ImageView)findViewById(R.id.image1);
button.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
newThread(newMyClass()).start();
}
});
}
publicclassMyClassimplementsRunnable{
@Override
publicvoidrun(){
Bitmapbitmap=null;
try{
URLurl=newURL(imagPath);
HttpURLConnectionhttpURLConnection=(HttpURLConnection)url.openConnection();
httpURLConnection.setDoInput(true);
httpURLConnection.connect();
InputStreaminputStream=httpURLConnection.getInputStream();
bitmap=BitmapFactory.decodeStream(inputStream);
}catch(MalformedURLExceptione){
e.printStackTrace();
}catch(IOExceptione){
e.printStackTrace();
}
Messagemessage=Message.obtain();
message.obj=bitmap;
message.what=IS_FINISH;
handler.sendMessage(message);
}
}
}
以上就是本文的全部内容，希望对大家学习Android软件编程有所帮助。