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Android使用线程获取网络图片

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感谢老罗视频教程,感谢各位的代码分享

捕获.PNG AndroidManifest.xml ```java <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.zdcrobot.handlermessage"> <uses-permission android: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> <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

activity_main.xmljava <?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns: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.classjava package com.zdcrobot.handlermessage;

import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.ImageView;

import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL;

public class MainActivity extends AppCompatActivity { private Button button; private ImageView imageView; private String imagPath = "http://pica.nipic.com/2007-11-09/200711912453162_2.jpg"; private final int IS_FINISH = 1; private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { Bitmap bitmap = (Bitmap)msg.obj; imageView.setImageBitmap(bitmap); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button = (Button)findViewById(R.id.button1); imageView = (ImageView)findViewById(R.id.image1); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { new Thread(new MyClass()).start(); } }); }

public class MyClass implements Runnable{

    @Override
    public void run() {
        Bitmap bitmap = null;
        try {
            URL url = new URL(imagPath);
            HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
            httpURLConnection.setDoInput(true);
            httpURLConnection.connect();
            InputStream inputStream = httpURLConnection.getInputStream();
            bitmap = BitmapFactory.decodeStream(inputStream);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        Message message = Message.obtain();
        message.obj = bitmap;
        message.what = IS_FINISH;
        handler.sendMessage(message);
    }
}

}

```

标签:java

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