TextureViewActivity.java revision ec19b4a764d512091a780fc93ced567dfbf80914 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.test.hwui;
18
19import android.app.Activity;
20import android.graphics.SurfaceTexture;
21import android.hardware.Camera;
22import android.os.Bundle;
23import android.view.Gravity;
24import android.view.TextureView;
25import android.view.View;
26import android.widget.Button;
27import android.widget.FrameLayout;
28
29import java.io.IOException;
30
31@SuppressWarnings({"UnusedDeclaration"})
32public class TextureViewActivity extends Activity implements TextureView.SurfaceTextureListener {
33    private Camera mCamera;
34    private TextureView mTextureView;
35    private FrameLayout mContent;
36
37    @Override
38    protected void onCreate(Bundle savedInstanceState) {
39        super.onCreate(savedInstanceState);
40
41        mContent = new FrameLayout(this);
42
43        mTextureView = new TextureView(this);
44        mTextureView.setSurfaceTextureListener(this);
45
46        Button button = new Button(this);
47        button.setText("Remove/Add");
48        button.setOnClickListener(new View.OnClickListener() {
49            private boolean mAdded = true;
50
51            @Override
52            public void onClick(View v) {
53                if (mAdded) {
54                    mContent.removeView(mTextureView);
55                } else {
56                    mContent.addView(mTextureView);
57                }
58                mAdded = !mAdded;
59            }
60        });
61
62        mContent.addView(mTextureView, new FrameLayout.LayoutParams(
63                FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT,
64                Gravity.CENTER));
65        mContent.addView(button, new FrameLayout.LayoutParams(
66                FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT,
67                Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM));
68        setContentView(mContent);
69    }
70
71    @Override
72    public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
73        mCamera = Camera.open();
74        Camera.Size previewSize = mCamera.getParameters().getPreviewSize();
75        mTextureView.setLayoutParams(new FrameLayout.LayoutParams(
76                previewSize.width, previewSize.height, Gravity.CENTER));
77
78        try {
79            mCamera.setPreviewTexture(surface);
80        } catch (IOException t) {
81            android.util.Log.e("TextureView", "Cannot set preview texture target!", t);
82        }
83
84        mCamera.startPreview();
85
86        mTextureView.setCameraDistance(5000);
87    }
88
89    @Override
90    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
91        // Ignored, the Camera does all the work for us
92    }
93
94    @Override
95    public void onSurfaceTextureDestroyed(SurfaceTexture surface) {
96        mCamera.stopPreview();
97        mCamera.release();
98    }
99
100    @Override
101    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
102        // Ignored
103    }
104}
105