android调用camera实现自定义照相

首先是布局文件，线性布局，左边两个按钮垂直摆放，右边预览图以及照相获取到的图片

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="horizontal" >    <LinearLayout        android:layout_width="200dip"        android:layout_height="150dip"        android:orientation="vertical" >        <Button            android:id="@+id/btn1"            android:layout_width="80dip"            android:layout_height="50dip"            android:text="Start takPic" />        <Button            android:id="@+id/btn2"            android:layout_width="80dip"            android:layout_height="50dip"            android:text="Get Pic" />    </LinearLayout>    <LinearLayout        android:id="@+id/cameraView"        android:layout_width="200dip"        android:layout_height="150dip"        android:orientation="vertical" >    </LinearLayout></LinearLayout>

代码，都写在一起的。包含一个自定义的surfaceView（用于相机的照相预览）.以及activity

package com.nico;import java.io.ByteArrayInputStream;import java.io.IOException;import android.app.Activity;import android.content.Context;import android.graphics.PixelFormat;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.hardware.Camera;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;public class Test extends Activity implements OnClickListener {/** Called when the activity is first created. */// camera 类private Camera camera = null;// 继承surfaceView的自定义view 用于存放照相的图片private CameraView cv = null;// 回调用的picture，实现里边的onPictureTaken方法，其中byte[]数组即为照相后获取到的图片信息private Camera.PictureCallback picture = new Camera.PictureCallback() {@Overridepublic void onPictureTaken(byte[] data, Camera camera) {// 主要就是将图片转化成drawable，设置为固定区域的背景（展示图片），当然也可以直接在布局文件里放一个surfaceView供使用。ByteArrayInputStream bais = new ByteArrayInputStream(data);Drawable d = BitmapDrawable.createFromStream(bais, Environment.getExternalStorageDirectory().getAbsolutePath()+ "/img.jpeg");l.setBackgroundDrawable(d);try {} catch (Exception e) {e.printStackTrace();}}};// 按钮 布局等定义，不作赘述Button btn1 = null;Button btn2 = null;LinearLayout l = null;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);getWindow().setFormat(PixelFormat.TRANSLUCENT);setContentView(R.layout.main);l = (LinearLayout) findViewById(R.id.cameraView);btn1 = (Button) findViewById(R.id.btn1);btn2 = (Button) findViewById(R.id.btn2);btn1.setOnClickListener(this);btn2.setOnClickListener(this);}//主要的surfaceView，负责展示预览图片，camera的开关class CameraView extends SurfaceView {//private SurfaceHolder holder = null;public CameraView(Context context) {super(context);holder = this.getHolder();holder.addCallback(new SurfaceHolder.Callback() {@Overridepublic void surfaceChanged(SurfaceHolder holder, int format,int width, int height) {Camera.Parameters parameters = camera.getParameters();//以下注释掉的是设置预览时的图像以及拍照的一些参数// parameters.setPictureFormat(PixelFormat.JPEG);// parameters.setPreviewSize(parameters.getPictureSize().width,// parameters.getPictureSize().height);// parameters.setFocusMode("auto");// parameters.setPictureSize(width, height);camera.setParameters(parameters);camera.startPreview();}@Overridepublic void surfaceCreated(SurfaceHolder holder) {camera = Camera.open();try {//设置camera预览的角度，因为默认图片是倾斜90度的camera.setDisplayOrientation(90);//设置holder主要是用于surfaceView的图片的实时预览，以及获取图片等功能，可以理解为控制camera的操作..camera.setPreviewDisplay(holder);} catch (IOException e) {camera.release();camera = null;e.printStackTrace();}}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {//顾名思义可以看懂camera.stopPreview();camera.release();camera = null;}});//holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);}}@Overridepublic void onClick(View v) {if (v == btn1) {l.removeAllViews();cv = new CameraView(Test.this);LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,LinearLayout.LayoutParams.FILL_PARENT);l.addView(cv, params);} else if (v == btn2) {camera.takePicture(null, null, picture);}}}

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