结合精简并优化了一下常用的拍照方法，实现了无预览拍照，下面是一个工具类
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Bitmap.Config;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.media.AudioManager;
import android.os.Build;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.SurfaceHolder.Callback;
import com.cn.zongyi.safebox.Constants;
import com.cn.zongyi.safebox.MyApplication;
import com.cn.zongyi.safebox.ui.NewBuildSafeBoxActivity;
import com.cn.zongyi.safebox.ui.R;
public class CameraUtil {
private SurfaceView sView; //画布视图
private SurfaceHolder surfaceHolder; //画布Holder
public Camera camera; // 定义系统所用的照相机
private boolean isPreview = false;// 是否在浏览中
private AudioManager manager; //声音管理
private int volumn; //声音值
private String picPath = "";
private NewBuildSafeBoxActivity context;
public CameraUtil(Context context) {
this.context = (NewBuildSafeBoxActivity) context;
}
@SuppressWarnings("deprecation")
public void initCameraFirst() {
manager = (AudioManager) context
.getSystemService(Context.AUDIO_SERVICE);
manager.setStreamMute(AudioManager.STREAM_SYSTEM, false);
volumn = manager.getStreamVolume(AudioManager.STREAM_SYSTEM);
if (volumn != 0) {
// 如果需要静音并且当前未静音（muteMode的设置可以放在Preference中）
manager.setStreamVolume(AudioManager.STREAM_SYSTEM, 0,
AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
}
sView = (SurfaceView) ((Activity) context).findViewById(R.id.sView);
if (MyApplication.invadeMonitor()) {
// 获得SurfaceView的SurfaceHolder
surfaceHolder = sView.getHolder();
// 为surfaceHolder添加一个回调监听器
surfaceHolder.addCallback(new Callback() {
public void surfaceChanged(SurfaceHolder holder, int format,
int width, int height) {
}
public void surfaceCreated(SurfaceHolder holder) {
// surface被创建时打开摄像头
initCamera();
}
// surface摧毁时释放摄像头
public void surfaceDestroyed(SurfaceHolder holder) {
// 如果camera不为null ,释放摄像头
if (camera != null) {
// 7.结束程序时，调用Camera的StopPriview()结束取景预览，并调用release()方法释放资源.
if (isPreview)
camera.stopPreview();
camera.release();
camera = null;
}
}
});
// 设置该SurfaceView自己不维护缓冲
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
}
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@SuppressLint("NewApi")
private void initCamera() {
if (!isPreview) {
int cameraCount = 0;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras(); // get cameras number
if (cameraCount == 1) {
// camera = Camera.open();// 调用Camera的open()方法打开相机。
Log.e("TAG", "无前置摄像头");
} else {
Log.e("TAG", "__________4");
for (int camIdx = 0; camIdx
布局文件看一下
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/new_build_resize_layout"
android:background="#ffffff"
android:layout_width="match_parent"
android:layout_height="match_parent" >
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:orientation="vertical"
android:paddingLeft="10dp"
android:paddingRight="10dp"
tools:ignore="UselessParent" >
android:layout_width="fill_parent"
android:layout_height="50dp">
android:id="@+id/sView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"/>
android:id="@+id/et_pwd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/please_enter_a_password"
android:inputType="number"
android:maxLength="@integer/edit_length"
android:password="true"
tools:ignore="Deprecated" >
android:layout_width="match_parent"
android:layout_height="wrap_content" >
android:id="@+id/ckb_show_pwd"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/show_pwd" />
android:id="@+id/next_step_linear"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="50dp"
android:layout_marginLeft="30dp"
android:layout_marginRight="30dp" >
android:id="@+id/next_step"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/new_build_safe_box_new_step_button" />
