tests/HwAccelerationTest/src/com/android/test/hwui/TextureViewActivity.java

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.test.hwui;

import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.app.Activity;
import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.Gravity;
import android.view.TextureView;
import android.view.View;
import android.widget.FrameLayout;

import java.io.IOException;

@SuppressWarnings({"UnusedDeclaration"})
public class TextureViewActivity extends Activity implements TextureView.SurfaceTextureListener {
    private Camera mCamera;
    private TextureView mTextureView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mTextureView = new TextureView(this);
        mTextureView.setSurfaceTextureListener(this);

        setContentView(mTextureView, new FrameLayout.LayoutParams(500, 400, Gravity.CENTER));
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        mCamera.stopPreview();
        mCamera.release();
    }

    @Override
    public void onSurfaceTextureAvailable(SurfaceTexture surface) {
        mCamera = Camera.open();

        try {
            mCamera.setPreviewTexture(surface);
        } catch (IOException t) {
            android.util.Log.e("TextureView", "Cannot set preview texture target!", t);
        }

        mCamera.startPreview();

        mTextureView.setCameraDistance(5000);

        ObjectAnimator animator = ObjectAnimator.ofFloat(mTextureView, "rotationY", 0.0f, 360.0f);
        animator.setRepeatMode(ObjectAnimator.REVERSE);
        animator.setRepeatCount(ObjectAnimator.INFINITE);
        animator.setDuration(4000);
        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                ((View) mTextureView.getParent()).invalidate();
            }
        });
        animator.start();

        animator = ObjectAnimator.ofFloat(mTextureView, "alpha", 1.0f, 0.0f);
        animator.setRepeatMode(ObjectAnimator.REVERSE);
        animator.setRepeatCount(ObjectAnimator.INFINITE);
        animator.setDuration(4000);
        animator.start();
    }
}