Camera摄像头拍照
请看例子:
main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <Button android:layout_width="match_parent" android:text="打开按钮" android:id="@+id/button1" android:layout_height="wrap_content"></Button> <Button android:layout_width="match_parent" android:text="关闭按钮" android:id="@+id/button2" android:layout_height="wrap_content"></Button> <Button android:layout_width="match_parent" android:text="拍照按钮" android:id="@+id/button3" android:layout_height="wrap_content"></Button> <SurfaceView android:id="@+id/mySurfaceView" android:gravity="center_horizontal" android:layout_width="fill_parent" android:layout_height="300px" /> <ImageView android:id="@+id/myImageView" android:layout_width="fill_parent" android:layout_height="300px" /> </LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.test" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".TestActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.CAMERA"/> <uses-feature android:name="android.hardware.camera" /> <uses-feature android:name="android.hardware.camera.autofocus" /> </manifest>
TestActivity.java主文件
package com.test; import java.io.IOException; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.PixelFormat; import android.hardware.Camera; import android.hardware.Camera.PictureCallback; import android.hardware.Camera.ShutterCallback; import android.os.Bundle; import android.util.DisplayMetrics; import android.view.SurfaceHolder; import android.view.SurfaceHolder.Callback; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.view.WindowManager; import android.widget.Button; import android.widget.ImageView; public class TestActivity extends Activity implements Callback, OnClickListener { /** Called when the activity is first created. */ SurfaceView mySurfaceView;// SurfaceView的引用 SurfaceHolder mySurfaceHolder;// SurfaceHolder的引用 Button button1;// 打开按钮 Button button2;// 关闭按钮 Button button3;// 拍照按钮 Camera myCamera;// Camera的引用 boolean isView = false;// 是否在浏览中 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //设置全屏显示 requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); button1 = (Button) findViewById(R.id.button1); button2 = (Button) findViewById(R.id.button2); button3 = (Button) findViewById(R.id.button3); button1.setOnClickListener(this); button2.setOnClickListener(this); button3.setOnClickListener(this); mySurfaceView = (SurfaceView) findViewById(R.id.mySurfaceView); mySurfaceHolder = mySurfaceView.getHolder(); //此对象用于在Camera和SurfaceView之间传递数据 mySurfaceHolder.addCallback(this); mySurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } public void initCamera() { //初始化相机 if (!isView) { myCamera = Camera.open(); } if (myCamera != null && !isView) { try { Camera.Parameters myParameters = myCamera.getParameters(); myParameters.setPictureFormat(PixelFormat.JPEG); //设置照片格式 myParameters.set("orientation", "portrait"); // myParameters.setPreviewSize(dm.widthPixels/2,dm.heightPixels/2); //大小 myCamera.setParameters(myParameters); myCamera.setPreviewDisplay(mySurfaceHolder); myCamera.startPreview(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } isView = true; } } @Override public void onClick(View v) { // TODO Auto-generated method stub if(v==button1){ initCamera(); }else if(v==button2){ isView=false; myCamera.stopPreview(); myCamera.release(); myCamera=null; }else if(v==button3){ myCamera.takePicture(mShutterCallback, myRawCallback, myjpegCallback); //进行照相 } } ShutterCallback mShutterCallback = new ShutterCallback() { @Override public void onShutter() { // TODO Auto-generated method stub } }; PictureCallback myRawCallback = new PictureCallback() { @Override public void onPictureTaken(byte[] data, Camera camera) { // TODO Auto-generated method stub } }; PictureCallback myjpegCallback = new PictureCallback() { @Override public void onPictureTaken(byte[] data, Camera camera) { //将照下来的图片用ImageView显示 // TODO Auto-generated method stub Bitmap bm=BitmapFactory.decodeByteArray(data, 0, data.length); ImageView myImageView=(ImageView) findViewById(R.id.myImageView); myImageView.setImageBitmap(bm); isView=false; myCamera.stopPreview(); myCamera.release(); myCamera=null; initCamera(); } }; @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // TODO Auto-generated method stub } @Override public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub } }
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