android 获取网络图片

首先别忘了导入xUtils的jar包

MainActivity类

public class MainActivity extends Activity {
    public static BitmapUtils bitmapUtils;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_loaded_image);
        ImageView img = (ImageView) findViewById(R.id.main);

        bitmapUtils = BitmapHelp.getBitmapUtils(this);
        bitmapUtils.configDefaultLoadingImage(R.drawable.ic_launcher);
        bitmapUtils.configDefaultLoadFailedImage(R.drawable.ic_launcher);
        bitmapUtils.configDefaultBitmapConfig(Bitmap.Config.RGB_565);
        // 设置最大宽高, 不设置时更具控件属性自适应.
        bitmapUtils.configDefaultBitmapMaxSize(BitmapCommonUtils.getScreenSize(this).scaleDown(3));

       //显示网络图片
        bitmapUtils.display(img,"http://cdn4.hbimg.cn/store/snsthumbs/100_100/celebrity/201414/C02DD8F99BA299EAD2AF959116.png");

    }

}

BitmapHelp类

public class BitmapHelp {
    private BitmapHelp() {
    }

    private static BitmapUtils bitmapUtils;

    /**
     * BitmapUtils不是单例的 根据需要重载多个获取实例的方法
     *
     * @param appContext
     *            application context
     * @return
     */
    public static BitmapUtils getBitmapUtils(Context appContext) {
        if (bitmapUtils == null) {
            bitmapUtils = new BitmapUtils(appContext);
        }
        return bitmapUtils;
    }

}

MyApplication类

public class MyApplication extends Application {
    public static MyApplication mMyApplication;

    @Override
    public void onCreate() {
        super.onCreate();
        mMyApplication = MyApplication.this;
        initCreate();
    }
    public void initCreate() {
        BitmapHelp.getBitmapUtils(mMyApplication);
    }
}

activity_loaded_image.xml

    <ImageView
        android:id="@+id/main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

AndroidManifest.xml

<application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:name=".MyApplication"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.loadedimage.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />