將手機圖庫中的圖像加載到android中的應用程序庫中

Question

在按鈕單擊時調用以下方法。該活動必須在創建時加載SD卡圖像。但是當我運行它是給零點例外。即使我使用INTERNAL_CONTENT_URI應用程序顯示空白。請幫助我。

package com.example.sampleapp; 

import android.content.Context; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.database.Cursor; 
import android.graphics.Bitmap; 
import android.os.Bundle; 
import android.os.Environment; 
import android.provider.MediaStore; 
import android.provider.MediaStore.Images.Media; 
import android.util.SparseBooleanArray; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.BaseAdapter; 
import android.widget.Button; 
import android.widget.CheckBox; 
import android.widget.CompoundButton; 
import android.widget.CompoundButton.OnCheckedChangeListener; 
import android.widget.GridView; 
import android.widget.ImageView; 
import android.widget.TextView; 

import com.example.sampleapp.MultiPhotoSelectActivity.Album; 
import com.nostra13.universalimageloader.core.DisplayImageOptions; 
import com.nostra13.universalimageloader.core.DisplayImageOptions.Builder; 
import com.nostra13.universalimageloader.core.ImageLoader; 
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener; 
import java.io.PrintStream; 
import java.util.ArrayList; 
import java.util.HashSet; 

public class MultiPhotoSelectActivity extends BaseActivity { 
    private AlbumAdapter albumAdapter; 
     Button done; 
     private GridView gridView; 
     private ImageAdapter imageAdapter; 
     private ArrayList<String> imageUrls; 
     private boolean isAlbumView; 
     private ArrayList mAlbumsList; 
     private DisplayImageOptions options; 
    @SuppressWarnings("deprecation") 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_multi_photo_select); 
     fillAlbums(); 
     this.options = new DisplayImageOptions.Builder().showStubImage(R.drawable.ic_gallery).showImageForEmptyUri(R.drawable.ic_gallery).cacheInMemory().cacheOnDisc().build(); 
     this.albumAdapter = new AlbumAdapter(this.mAlbumsList); 
     this.gridView = ((GridView)findViewById(R.id.gridview)); 
     this.done = ((Button)findViewById(R.id.done)); 
     this.gridView.setAdapter(this.albumAdapter); 
     this.gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() 
     { 
      public void onItemClick(AdapterView<?> paramAnonymousAdapterView, View paramAnonymousView, int paramAnonymousInt, long paramAnonymousLong) 
      { 
      if (MultiPhotoSelectActivity.this.isAlbumView) 
      { 
       MultiPhotoSelectActivity.this.isAlbumView = false; 
       MultiPhotoSelectActivity.this.fillGallery(((MultiPhotoSelectActivity.Album)MultiPhotoSelectActivity.this.mAlbumsList.get(paramAnonymousInt)).albumId); 
      } 
      } 
     }); 
     this.done.setOnClickListener(new View.OnClickListener() 
     { 
      public void onClick(View paramAnonymousView) 
      { 
      ArrayList<String> localArrayList = MultiPhotoSelectActivity.this.imageAdapter.getCheckedItems(); 
      Intent localIntent = new Intent(MultiPhotoSelectActivity.this, CreateSlideActivity.class); 
      localIntent.putExtra("list", localArrayList); 
      System.out.println(" " + localArrayList); 
      MultiPhotoSelectActivity.this.setResult(-1, localIntent); 
      MultiPhotoSelectActivity.this.finish(); 
      } 
     }); 
    } 


    private void fillAlbums() 
     { 
     this.isAlbumView = true; 
     this.mAlbumsList = new ArrayList(); 
     String[] arrayOfString = { "_data", "_id", "bucket_display_name", "bucket_id" }; 
     Cursor localCursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, arrayOfString, null, null, null); 
     HashSet<String> localHashSet = new HashSet<String>(); 
     for (int i = 0;; i++) 
     { 
      if (i >= localCursor.getCount()) { 
      return; 
      } 
      Album localAlbum = new Album(); 
      localCursor.moveToPosition(i); 
      int j = localCursor.getColumnIndex("_data"); 
      int k = localCursor.getColumnIndex("bucket_display_name"); 
      int m = localCursor.getColumnIndex("bucket_id"); 
      localCursor.getColumnIndex("_id"); 
      String str = localCursor.getString(k); 
      localAlbum.setAlbumName(str); 
      localAlbum.setImageUrl(localCursor.getString(j)); 
      localAlbum.albumId = localCursor.getString(m); 
      if (localHashSet.add(str)) { 
      this.mAlbumsList.add(localAlbum); 
      } 
      System.out.println("=====> BUCKET_DISPLAY_NAME => " + localCursor.getString(localCursor.getColumnIndex("bucket_display_name"))); 
     } 
     } 
    private void fillGallery(String paramString) 
     { 
     String[] arrayOfString = { "_data", "_id" }; 
     //String path= Environment.getExternalStorageDirectory(); 
     Cursor localCursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, arrayOfString, "bucket_id=?", new String[] { paramString }, "datetaken DESC"); 
     this.imageUrls = new ArrayList<String>(); 
     for (int i = 0;; i++) 
     { 
      if (i >= localCursor.getCount()) 
      { 
      this.imageAdapter = new ImageAdapter(this.imageUrls); 
      this.gridView.setAdapter(this.imageAdapter); 
      return; 
      } 
      localCursor.moveToPosition(i); 
      int j = localCursor.getColumnIndex("_data"); 
      this.imageUrls.add(localCursor.getString(j)); 
     } 
     } 
     public void onBackPressed() 
     { 

     if (this.isAlbumView) 
     { 
      super.onBackPressed(); 
      return; 
     } 
     this.isAlbumView = true; 
     this.gridView.setAdapter(this.albumAdapter); 
     } 
     public class Album 
     { 
     public String albumId; 
     private String albumName; 
     private String imageUrl; 

     public Album() { 
      super(); 
     } 

     public String getAlbumName() 
     { 
      return this.albumName; 
     } 

     public String getImageUrl() 
     { 
      return this.imageUrl; 
     } 

     public void setAlbumName(String paramString) 
     { 
      this.albumName = paramString; 
     } 

     public void setImageUrl(String paramString) 
     { 
      this.imageUrl = paramString; 
     } 
     } 

     public class AlbumAdapter 
     extends BaseAdapter 
     { 
     Context mContext; 
     ArrayList<MultiPhotoSelectActivity.Album> mList; 

     public AlbumAdapter(ArrayList mAlbumsList) 
     { 
     // Object localObject; 
      this.mList = mAlbumsList; 
     } 

     public int getCount() 
     { 
      return this.mList.size(); 
     } 

     public MultiPhotoSelectActivity.Album getItem(int paramInt) 
     { 
      return (MultiPhotoSelectActivity.Album)this.mList.get(paramInt); 
     } 

     public long getItemId(int paramInt) 
     { 
      return paramInt; 
     } 

     public View getView(int paramInt, View paramView, ViewGroup paramViewGroup) 
     { 
      if (paramView == null) { 
      paramView = ((LayoutInflater)MultiPhotoSelectActivity.this.getSystemService("layout_inflater")).inflate(R.layout.row_album_item, null); 
      } 
      final ImageView localImageView = (ImageView)paramView.findViewById(R.id.albumview); 
      TextView localTextView = (TextView)paramView.findViewById(R.id.albumName); 
      MultiPhotoSelectActivity.this.imageLoader.displayImage("file://" + ((MultiPhotoSelectActivity.Album)this.mList.get(paramInt)).imageUrl, localImageView, MultiPhotoSelectActivity.this.options, new SimpleImageLoadingListener() 
      { 

      public void onLoadingComplete(Bitmap paramAnonymousBitmap) 
      { 
       Animation localAnimation = AnimationUtils.loadAnimation(MultiPhotoSelectActivity.this, R.anim.fade_in); 
       localImageView.setAnimation(localAnimation); 
       localAnimation.start(); 
      } 
      }); 
      localTextView.setText(((MultiPhotoSelectActivity.Album)this.mList.get(paramInt)).albumName); 
      return paramView; 
     } 
     } 

     class ImageAdapter 
     extends BaseAdapter 
     { 
     CompoundButton.OnCheckedChangeListener mCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() 
     { 
      public void onCheckedChanged(CompoundButton paramAnonymousCompoundButton, boolean paramAnonymousBoolean) 
      { 
      MultiPhotoSelectActivity.ImageAdapter.this.mSparseBooleanArray.put(((Integer)paramAnonymousCompoundButton.getTag()).intValue(), paramAnonymousBoolean); 
      } 
     }; 
     Context mContext; 
     ArrayList<String> mList; 
     SparseBooleanArray mSparseBooleanArray = new SparseBooleanArray(); 

     public ImageAdapter(ArrayList<String> imageUrls) 
     { 
     // Object localObject; 
      this.mList = imageUrls; 
     } 

     public ArrayList<String> getCheckedItems() 
     { 
      ArrayList<String> localArrayList = new ArrayList<String>(); 
      int i = 0; 
      if (i >= this.mList.size()) { 
      return localArrayList; 
      } 
      if (!this.mSparseBooleanArray.get(i)) {} 
      for (;;) 
      { 
      i++; 
      localArrayList.add((String)this.mList.get(i)); 
      } 
     } 

     public int getCount() 
     { 
      return MultiPhotoSelectActivity.this.imageUrls.size(); 
     } 

     public Object getItem(int paramInt) 
     { 
      return null; 
     } 

     public long getItemId(int paramInt) 
     { 
      return paramInt; 
     } 

     public View getView(int paramInt, View paramView, ViewGroup paramViewGroup) 
     { 
      if (paramView == null) { 
      paramView = ((LayoutInflater)MultiPhotoSelectActivity.this.getSystemService("layout_inflater")).inflate(R.layout.row_multiphoto_item, null); 
      } 
      MultiPhotoSelectActivity.this.done.setVisibility(0); 
      CheckBox localCheckBox = (CheckBox)paramView.findViewById(R.id.checkBox1); 
      final ImageView localImageView = (ImageView)paramView.findViewById(R.id.imageView2); 
      MultiPhotoSelectActivity.this.imageLoader.displayImage("file://" + (String)MultiPhotoSelectActivity.this.imageUrls.get(paramInt), localImageView, MultiPhotoSelectActivity.this.options, new SimpleImageLoadingListener() 
      { 
      @SuppressWarnings("unused") 
      public void onLoadingComplete(Bitmap paramAnonymousBitmap) 
      { 
       Animation localAnimation = AnimationUtils.loadAnimation(MultiPhotoSelectActivity.this,R.anim.fade_in); 
       localImageView.setAnimation(localAnimation); 
       localAnimation.start(); 
      } 
      }); 
      localCheckBox.setTag(Integer.valueOf(paramInt)); 
      localCheckBox.setChecked(this.mSparseBooleanArray.get(paramInt)); 
      localCheckBox.setOnCheckedChangeListener(this.mCheckedChangeListener); 
      return paramView; 
     } 
     } 
    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.multi_photo_select, menu); 
     return true; 
    } 

} 

以下是應該顯示sdcard圖像的gridview的xml。

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@drawable/plainbackground" 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    > 
    <GridView 
     android:gravity="center" 
     android:id="@+id/gridview" 
     android:scrollbars="vertical" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:horizontalSpacing="4.0dip" 
     android:verticalSpacing="2.0dip" 
     android:stretchMode="columnWidth" 
     android:columnWidth="100.0dip" 
     android:numColumns="auto_fit" 
     android:layout_weight="1.0" /> 
    <Button 
     android:layout_gravity="center" 
     android:id="@+id/done" 
     android:background="@drawable/done" 
     android:visibility="gone" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" /> 

</LinearLayout> 

以下xml是用於SD卡的專輯視圖。

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 
    android:padding="10.0dip" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    xmlns:android="http://schemas.android.com/apk/res/android"> 
    <RelativeLayout 
     android:id="@+id/container" 
     android:background="@drawable/ic_folder" 
     android:padding="2.0dip" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"> 
     <ImageView 
      android:id="@+id/albumview" 
      android:background="@drawable/ic_folder" 
      android:layout_width="50.0dip" 
      android:layout_height="50.0dip" 
      android:scaleType="centerCrop" 
      android:layout_centerHorizontal="true" 
      android:layout_centerVertical="true" /> 
    </RelativeLayout> 
    <TextView 
     android:textSize="11.0dip" 
     android:textColor="@android:color/black" 
     android:id="@+id/albumName" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="3.0dip" 
     android:text="Large Text" 
     android:layout_below="@id/container" 
     android:layout_centerHorizontal="true" /> 
</RelativeLayout> 

Answer 1

Intent intent = new Intent(Intent.ACTION_PICK, 
     android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
     startActivityForResult(intent, 0); 
@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
// TODO Auto-generated method stub 
super.onActivityResult(requestCode, resultCode, data); 

if (resultCode == RESULT_OK){ 
Uri targetUri = data.getData(); 
textTargetUri.setText(targetUri.toString()); 
Bitmap bitmap; 
try { 
    bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(targetUri)); 
    targetImage.setImageBitmap(bitmap); 
} catch (FileNotFoundException e) { 
    // TODO Auto-generated catch block 
    e.printStackTrace(); 
} 
} 
}