android+壁纸模糊,android中imageview背景图像的模糊处理

试试看--->>

XML

android:layout_width="match_parent"

android:layout_height="400dp"

xmlns:android="http://schemas.android.com/apk/res/android">

android:scaleType="centerCrop" // scaletype depends upon image you adjust or dont put

android:id="@+id/customProfileGridImg"

android:layout_width="match_parent"

android:layout_height="400dp"

/>

android:layout_width="match_parent"

android:layout_height="500dp"

android:scaleType="centerCrop" // scaletype depends upon image you adjust or dont put

android:src="@drawable/nature"

android:layout_centerInParent="true"/>

-->

public class MainActivity extends AppCompatActivity {

private static final float BLUR_RADIUS = 25f;

ImageView imageView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.mjhgf);

imageView = (ImageView) findViewById(R.id.customProfileGridImg);

Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.nature);

Bitmap blurredBitmap = blur(bitmap);

imageView.setImageBitmap(blurredBitmap);

}

public Bitmap blur(Bitmap image) {

if (null == image) return null;

Bitmap outputBitmap = Bitmap.createBitmap(image);

final RenderScript renderScript = RenderScript.create(this);

Allocation tmpIn = Allocation.createFromBitmap(renderScript, image);

Allocation tmpOut = Allocation.createFromBitmap(renderScript, outputBitmap);

//Intrinsic Gausian blur filter

ScriptIntrinsicBlur theIntrinsic = ScriptIntrinsicBlur.create(renderScript, Element.U8_4(renderScript));

theIntrinsic.setRadius(BLUR_RADIUS);

theIntrinsic.setInput(tmpIn);

theIntrinsic.forEach(tmpOut);

tmpOut.copyTo(outputBitmap);

return outputBitmap;

}

}