<LinearLayout 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"   android:orientation="vertical"   android:gravity="center_horizontal"    >    <Button     android:id="@+id/button1"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="拍照獲取縮略圖" />    <Button     android:id="@+id/button2"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_marginTop="14dp"     android:text="拍照獲取原圖" />    <ImageView     android:id="@+id/imageView1"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:src="@drawable/ic_launcher" />  </LinearLayout> 

package com.example.cameardemo;  import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException;  import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.support.v7.app.ActionBarActivity; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageView;  public class MainActivity extends ActionBarActivity implements OnClickListener {    private static int REQUEST_THUMBNAIL = 1;// 請求縮略圖信號標識   private static int REQUEST_ORIGINAL = 2;// 請求原圖信號標識   private Button button1, button2;   private ImageView mImageView;   private String sdPath;//SD卡的路徑   private String picPath;//圖片存儲路徑    @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.fragment_main);      button1 = (Button) findViewById(R.id.button1);     button2 = (Button) findViewById(R.id.button2);     mImageView = (ImageView) findViewById(R.id.imageView1);      button1.setOnClickListener(this);     button2.setOnClickListener(this);     //獲取SD卡的路徑     sdPath = Environment.getExternalStorageDirectory().getPath();     picPath = sdPath + "/" + "temp.png";     Log.e("sdPath1",sdPath);   }    @Override   public void onClick(View view) {     switch (view.getId()) {     case R.id.button1://第一種方法，獲取壓縮圖       Intent intent1 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);       // 啟動相機       startActivityForResult(intent1, REQUEST_THUMBNAIL);       break;      case R.id.button2://第二種方法，獲取原圖       Intent intent2 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);       Uri uri = Uri.fromFile(new File(picPath));       //為拍攝的圖片指定一個存儲的路徑       intent2.putExtra(MediaStore.EXTRA_OUTPUT, uri);       startActivityForResult(intent2, REQUEST_ORIGINAL);       break;      default:       break;     }   }    /**    * 返回應用時回調方法    */   @Override   protected void onActivityResult(int requestCode, int resultCode, Intent data) {     super.onActivityResult(requestCode, resultCode, data);      if (resultCode == RESULT_OK) {       if (requestCode == REQUEST_THUMBNAIL) {//對應第一種方法         /**          * 通過這種方法取出的拍攝會默認壓縮，因為如果相機的像素比較高拍攝出來的圖會比較高清，          * 如果圖太大會造成內存溢出（OOM），因此此種方法會默認給圖片盡心壓縮          */         Bundle bundle = data.getExtras();         Bitmap bitmap = (Bitmap) bundle.get("data");         mImageView.setImageBitmap(bitmap);       }       else if(resultCode == REQUEST_ORIGINAL){//對應第二種方法         /**          * 這種方法是通過內存卡的路徑進行讀取圖片，所以的到的圖片是拍攝的原圖          */         FileInputStream fis = null;         try {           Log.e("sdPath2",picPath);           //把圖片轉化為字節流           fis = new FileInputStream(picPath);           //把流轉化圖片           Bitmap bitmap = BitmapFactory.decodeStream(fis);           mImageView.setImageBitmap(bitmap);         } catch (FileNotFoundException e) {           e.printStackTrace();         }finally{           try {             fis.close();//關閉流           } catch (IOException e) {             e.printStackTrace();           }         }       }     }   }  } 

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"   package="com.example.cameardemo"   android:versionCode="1"   android:versionName="1.0" >    <uses-sdk     android:minSdkVersion="8"     android:targetSdkVersion="19" />   <!-- 操作sd卡的權限 -->   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>      <application     android:allowBackup="true"     android:icon="@drawable/ic_launcher"     android:label="@string/app_name"     android:theme="@style/AppTheme" >     <activity       android:name="com.example.cameardemo.MainActivity"       android:label="@string/app_name" >       <intent-filter>         <action android:name="android.intent.action.MAIN" />          <category android:name="android.intent.category.LAUNCHER" />       </intent-filter>              <!-- 具有相機功能 -->       <intent-filter >         <action android:name="android.media.action.IMAGE_CAPTURE"/>                  <category android:name="android.intent.category.DEFAULT" />       </intent-filter>     </activity>   </application>  </manifest>