tests/HwAccelerationTest/src/com/android/test/hwui/GetBitmapActivity.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.app.Activity;
import android.graphics.Bitmap;
import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.os.Bundle;
import android.os.Environment;
import android.view.Gravity;
import android.view.TextureView;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

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

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

        FrameLayout content = new FrameLayout(this);

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

        Button button = new Button(this);
        button.setText("Copy bitmap to /sdcard/textureview.png");
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Bitmap b = mTextureView.getBitmap();
                try {
                    FileOutputStream out = new FileOutputStream(
                            Environment.getExternalStorageDirectory() + "/textureview.png");
                    try {
                        b.compress(Bitmap.CompressFormat.PNG, 100, out);
                    } finally {
                        try {
                            out.close();
                        } catch (IOException e) {
                            // Ignore
                        }
                    }
                } catch (FileNotFoundException e) {
                    // Ignore
                }
            }
        });

        content.addView(mTextureView, new FrameLayout.LayoutParams(500, 400, Gravity.CENTER));
        content.addView(button, new FrameLayout.LayoutParams(
                FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT,
                Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM));
        setContentView(content);
    }

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

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

        mCamera.startPreview();
    }

    @Override
    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
        // Ignored, the Camera does all the work for us
    }

    @Override
    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
        mCamera.stopPreview();
        mCamera.release();
        return true;
    }

    @Override
    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
        // Ignored
    }
}