Thứ Bảy, 7 tháng 7, 2012

Enable Hardware Acceleration for Android 3.0 or later devices

0
12:09
Android 3.0 (Honeycomb) introduced Hardware Acceleration. To enable Hardware Acceleration for your app, edit AndroidManifest.xml to insert the attribute android:hardwareAccelerated="true" in <application /> tag.

To check if any view/canvas is hardware accelerated, simple call:
- View.isHardwareAccelerated(), or
- Canvas.isHardwareAccelerated()

Hardware Acceleration

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidhardwareacceleration"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="15" />

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

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

</manifest>


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ImageView
android:id="@+id/iv"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<TextView
android:id="@+id/hw"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="Touch the big icon to check isHardwareAccelerated"/>

</RelativeLayout>


package com.example.androidhardwareacceleration;

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends Activity {

TextView hw;
ImageView imageView;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

imageView = (ImageView)findViewById(R.id.iv);
hw = (TextView)findViewById(R.id.hw);

imageView.setImageResource(R.drawable.ic_launcher);

imageView.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View arg0) {
boolean isHWAccelerated = imageView.isHardwareAccelerated();
hw.setText("isHardwareAccelerated: " + String.valueOf(isHWAccelerated));

}});

}

}


Related:
- Enable Hardware Acceleration using Java code


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