<uses-permission android:name="android.permission.CAMERA"/> 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  tools:context=".MainActivity" > 
   
  <SurfaceView  
    android:id="@+id/sView" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"/> 
  <Button  
    android:id="@+id/take" 
    android:layout_alignParentBottom="true" 
    android:onClick="capture" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/take"/> 
 
</RelativeLayout> 

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" > 
  <EditText  
    android:id="@+id/photoNmae" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"/> 
  <ImageView  
    android:id="@+id/show" 
    android:layout_below="@id/photoNmae" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"/> 
    
</RelativeLayout> 

package com.android.xiong.cameratest; 
 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.content.DialogInterface; 
import android.graphics.Bitmap; 
import android.graphics.Bitmap.CompressFormat; 
import android.graphics.BitmapFactory; 
import android.graphics.ImageFormat; 
import android.hardware.Camera; 
import android.hardware.Camera.AutoFocusCallback; 
import android.hardware.Camera.PictureCallback; 
import android.hardware.Camera.ShutterCallback; 
import android.os.Bundle; 
import android.os.Environment; 
import android.util.DisplayMetrics; 
import android.view.Display; 
import android.view.Menu; 
import android.view.SurfaceHolder; 
import android.view.SurfaceHolder.Callback; 
import android.view.LayoutInflater; 
import android.view.SurfaceView; 
import android.view.View; 
import android.view.Window; 
import android.view.WindowManager; 
import android.widget.EditText; 
import android.widget.ImageView; 
 
public class MainActivity extends Activity { 
 
  SurfaceView sView; 
  SurfaceHolder surfaceHodler; 
  int screenWidth, screenHeight; 
  // 定義系統(tǒng)所用的照相機(jī) 
  Camera camera; 
  // 是否存在預(yù)覽中 
  boolean isPreview = false; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    // 設(shè)置全屏 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
        WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.activity_main); 
    // 獲取窗口管理器 
    WindowManager wm = getWindowManager(); 
    Display display = wm.getDefaultDisplay(); 
    DisplayMetrics metrics = new DisplayMetrics(); 
    // 獲取屏幕的寬和高 
    display.getMetrics(metrics); 
    screenWidth = metrics.widthPixels; 
    screenHeight = metrics.heightPixels; 
    sView = (SurfaceView) findViewById(R.id.sView); 
    // 設(shè)置surface不需要自己的維護(hù)緩存區(qū) 
    sView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    // 獲得SurfaceView的SurfaceHolder 
    surfaceHodler = sView.getHolder(); 
    // 為srfaceHolder添加一個(gè)回調(diào)監(jiān)聽(tīng)器 
    surfaceHodler.addCallback(new Callback() { 
 
      @Override 
      public void surfaceDestroyed(SurfaceHolder arg0) { 
        // 如果camera不為null，釋放攝像頭 
        if (camera != null) { 
          if (isPreview) 
            camera.stopPreview(); 
          camera.release(); 
          camera = null; 
        } 
      } 
 
      @Override 
      public void surfaceCreated(SurfaceHolder arg0) { 
        // 打開(kāi)攝像頭 
        initCamera(); 
 
      } 
 
      @Override 
      public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, 
          int arg3) { 
      } 
    }); 
  } 
 
  private void initCamera() { 
    if (!isPreview) { 
      // 此處默認(rèn)打開(kāi)后置攝像頭 
      // 通過(guò)傳入?yún)?shù)可以打開(kāi)前置攝像頭 
      camera = Camera.open(); 
      camera.setDisplayOrientation(90); 
    } 
    if (!isPreview && camera != null) { 
      Camera.Parameters parameters = camera.getParameters(); 
      // 設(shè)置預(yù)覽照片的大小 
      parameters.setPreviewSize(screenWidth, screenHeight); 
      // 設(shè)置預(yù)覽照片時(shí)每秒顯示多少幀的最小值和最大值 
      parameters.setPreviewFpsRange(4, 10); 
      // 設(shè)置照片的格式 
      parameters.setPictureFormat(ImageFormat.JPEG); 
      // 設(shè)置JPG照片的質(zhì)量 
      parameters.set("jpeg-quality", 85); 
      // 設(shè)置照片的大小 
      parameters.setPictureSize(screenWidth, screenHeight); 
      // 通過(guò)SurfaceView顯示取景畫(huà)面 
      try { 
        camera.setPreviewDisplay(surfaceHodler); 
      } catch (IOException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
      } 
      // 開(kāi)始預(yù)覽 
      camera.startPreview(); 
      isPreview = true; 
    } 
  } 
 
  public void capture(View source) { 
    if (camera != null) { 
      // 控制攝像頭自動(dòng)對(duì)焦后才拍攝 
      camera.autoFocus(autoFocusCallback); 
    } 
  } 
 
  AutoFocusCallback autoFocusCallback = new AutoFocusCallback() { 
 
    @Override 
    public void onAutoFocus(boolean arg0, Camera arg1) { 
      if (arg0) { 
        // takePicture()方法需要傳入三個(gè)監(jiān)聽(tīng)參數(shù) 
        // 第一個(gè)監(jiān)聽(tīng)器；當(dāng)用戶按下快門(mén)時(shí)激發(fā)該監(jiān)聽(tīng)器 
        // 第二個(gè)監(jiān)聽(tīng)器；當(dāng)相機(jī)獲取原始照片時(shí)激發(fā)該監(jiān)聽(tīng)器 
        // 第三個(gè)監(jiān)聽(tīng)器；當(dāng)相機(jī)獲取JPG照片時(shí)激發(fā)該監(jiān)聽(tīng)器 
        camera.takePicture(new ShutterCallback() { 
 
          @Override 
          public void onShutter() { 
            // 按下快門(mén)瞬間會(huì)執(zhí)行此處代碼 
          } 
        }, new PictureCallback() { 
 
          @Override 
          public void onPictureTaken(byte[] arg0, Camera arg1) { 
            // 此處代碼可以決定是否需要保存原始照片信息 
          } 
        }, myJpegCallback); 
      } 
 
    } 
  }; 
  PictureCallback myJpegCallback = new PictureCallback() { 
 
    @Override 
    public void onPictureTaken(byte[] data, Camera camera) { 
      // 根據(jù)拍照所得的數(shù)據(jù)創(chuàng)建位圖 
      final Bitmap bm = BitmapFactory.decodeByteArray(data, 0, 
          data.length); 
      // 加載布局文件 
      View saveDialog = getLayoutInflater().inflate(R.layout.save, null); 
      final EditText potoName = (EditText) saveDialog 
          .findViewById(R.id.photoNmae); 
      // 獲取saveDialog對(duì)話框上的ImageView組件 
      ImageView show = (ImageView) saveDialog.findViewById(R.id.show); 
      // 顯示剛剛拍得的照片 
      show.setImageBitmap(bm); 
      // 使用AlertDialog組件 
      new AlertDialog.Builder(MainActivity.this) 
          .setView(saveDialog) 
          .setNegativeButton("取消", null) 
          .setPositiveButton("保存", 
              new DialogInterface.OnClickListener() { 
                @Override 
                public void onClick(DialogInterface arg0, 
                    int arg1) { 
                  // 創(chuàng)建一個(gè)位于SD卡上的文件 
                  File file = new File(Environment 
                      .getExternalStorageDirectory() 
                      + "/" 
                      + potoName.getText().toString() 
                      + ".jpg"); 
                  FileOutputStream fileOutStream=null; 
                  try { 
                    fileOutStream=new FileOutputStream(file); 
                    //把位圖輸出到指定的文件中 
                    bm.compress(CompressFormat.JPEG, 100, fileOutStream); 
                    fileOutStream.close(); 
                  } catch (IOException io) { 
                    io.printStackTrace(); 
                  } 
 
                } 
              }).show(); 
      //重新瀏覽 
      camera.stopPreview(); 
      camera.startPreview(); 
      isPreview=true; 
    } 
  }; 
 
  @Override 
  public boolean onCreateOptionsMenu(Menu menu) { 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
  } 
 
}