利用TextureView来实现拍照功能

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很简单直接上源码

import android.Manifest;import android.content.pm.PackageManager;import android.graphics.Color;import android.graphics.SurfaceTexture;import android.hardware.Camera;import android.os.Bundle;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.TextureView;import android.view.View;import android.widget.RelativeLayout;import android.widget.TextView;import java.io.IOException;public class MainActivity extends AppCompatActivity {    private TextureView mTextureView;    private Camera mCamera;    private SurfaceTexture mSurfaceTexture;    private TextView mTextViewStart, mTextViewStop;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();    }    private void init() {        mTextViewStart = (TextView) findViewById(R.id.act_main_textview_start);        mTextViewStart.setOnClickListener(new CliclListener());        mTextViewStop = (TextView) findViewById(R.id.act_main_textview_stop);        mTextViewStop.setOnClickListener(new CliclListener());        mTextureView = (TextureView) findViewById(R.id.act_main_textureview);        mTextureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {            @Override            public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {                Log.i("aaa", "onSurfaceTextureAvailable  width:" + width + " height:" + height);                mSurfaceTexture = surface;            }            @Override            public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {                Log.i("aaa", "onSurfaceTextureSizeChanged  width:" + width + " height:" + height);            }            @Override            public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {                Log.i("aaa", "onSurfaceTextureDestroyed");                stopPreviewCamera();                return false;            }            @Override            public void onSurfaceTextureUpdated(SurfaceTexture surface) {                //                Log.i("aaa","onSurfaceTextureUpdated");            }        });    }    //开始预览视屏    private void startPreviewCamera() {        mCamera = Camera.open();        Camera.Size previewSize = mCamera.getParameters().getPreviewSize();        Log.i("aaa", "previewSize.width:" + previewSize.width + "  previewSize.height:" + previewSize.height);        RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(previewSize.width, previewSize.height);        layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);        layoutParams.addRule(RelativeLayout.CENTER_VERTICAL);        mTextureView.setLayoutParams(layoutParams);        try {            mCamera.setPreviewTexture(mSurfaceTexture);        } catch (IOException e) {            e.printStackTrace();        }        mCamera.startPreview();        mTextureView.setAlpha(1.0f);        mTextureView.setRotation(90.0f);    }    private void stopPreviewCamera() {        mCamera.stopPreview();        mCamera.release();    }    //检查拍照权限    private void checkCameraPermission() {        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {            Log.i("aaa", "已经获取权限");        } else {            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA}, 1);//1 can be another integer        }    }    private class CliclListener implements View.OnClickListener {        @Override        public void onClick(View v) {            switch (v.getId()) {                case R.id.act_main_textview_start:                    checkCameraPermission();                    startPreviewCamera();                    break;                case R.id.act_main_textview_stop:                    stopPreviewCamera();                    mTextureView.setBackgroundColor(Color.WHITE);                    break;            }        }    }}

布局文件：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"          package="com.test.wb.textureviewtest">    <uses-sdk        android:minSdkVersion="16"        android:targetSdkVersion="22" />    <!-- 增加文件存储和访问摄像头的权限 -->    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.CAMERA"/>    <uses-feature android:name="android.hardware.camera"/>    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN"/>                <category android:name="android.intent.category.LAUNCHER"/>            </intent-filter>        </activity>    </application></manifest>

效果图

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