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我正在尝试下一步：我有一个 ImageView，我希望它在用户触摸它以让他选择或拍照时显示为图片浏览器或相机。我发现：

private void openPictureBrowser()
{
   Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
   intent.setType("image/*");
   intent.putExtra(Intent.EXTRA_TITLE,"A Custom Title"); //optional
   intent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); //optional
   try {
      startActivityForResult(intent, 1);
   } catch (Exception e) {
      e.printStackTrace();
   }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
   switch (requestCode) {
      case 1: {
         if (resultCode == RESULT_OK && data != null && data.getData() != null) {
            String filePath = data.getData().getPath(); //WARNING: this is NOT your real path (in my case, value is set to "/external/images/media/4"
         }
      }
   }
}

如果我想添加相机，我可以在 openPictureBrowser 中做什么？

我应该在 onActivityResult 中做什么来将 filePath 设置为 ImageView 背景？

有人可以给我一个提示吗？？

谢谢！

4

2 回答 2

0 
public class Set_image extends Activity implements OnClickListener
{
    Button btn_capture_image,btn_share_from_gallery;
    ImageView iv_set_image;
    private static final int REQUEST_CODE = 1;
     private static final int CAMERA_REQUEST = 1888; 
    String filePath="";
    Bitmap Main_bitmap;


 @Override
    public void onCreate(Bundle savedInstanceState)
    {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.set_image);

        btn_capture_image =(Button) findViewById(R.id.button_capture_image);
        btn_share_from_gallery =(Button) findViewById(R.id.button_share_from_gallery);
        iv_set_image = (ImageView) findViewById(R.id.imageView_set_iamge);

        btn_capture_image.setOnClickListener(this);
        btn_share_from_gallery.setOnClickListener(this);

    }


public void onClick(View v) 
{

        if (v == btn_capture_image)
        {
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
            startActivityForResult(cameraIntent, CAMERA_REQUEST); 
        }


        if (v == btn_share_from_gallery)
        {
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            intent.addCategory(Intent.CATEGORY_OPENABLE);
            startActivityForResult(intent, REQUEST_CODE);
        }
}

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) 
    {

        if (requestCode == CAMERA_REQUEST)
        {  
            Main_bitmap = (Bitmap) data.getExtras().get("data");  
            iv_set_image.setImageBitmap(Main_bitmap);    
        }   

        if (requestCode == REQUEST_CODE && resultCode == Activity.RESULT_OK)

            try 
             {

                    Uri selectedImage = data.getData();
                    String[] filePathColumn = {MediaStore.Images.Media.DATA};
                    Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);

              if (cursor.moveToFirst()) 
              {
                     int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                     filePath = cursor.getString(columnIndex);
                     BitmapFactory.Options options4 = new BitmapFactory.Options();
                     options4.inSampleSize = 1;
                     Main_bitmap = BitmapFactory.decodeFile(filePath, options4);                         iv_set_image.setImageBitmap(Main_bitmap);


               }
                    cursor.close();
             } 
             catch (Exception e)
             {
                    e.printStackTrace();
             }
            super.onActivityResult(requestCode, resultCode, data);
}
于 2012-11-06T10:36:19.427 回答
-1

使用以下代码：

import java.io.File;
import java.util.ArrayList;
import java.util.Calendar;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.ContextMenu;
import android.view.Gravity;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;

public class LoadImage extends Activity 
{
    Activity activity=null;
    Context context=null;

    Button header_left_btn=null;
    Button header_right_btn=null;
    TextView header_text=null;
    TableLayout image_table=null;

    ArrayList<String> image_list=new ArrayList<String>();
    ArrayList<Drawable> image_drawable=new ArrayList<Drawable>();
    String path="";

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
        setContentView(R.layout.main);
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.header);

        activity=LoadImage.this;
        context=LoadImage.this;

        header_left_btn=(Button)findViewById(R.id.header_left_btn);
        header_right_btn=(Button)findViewById(R.id.header_right_btn);
        header_text=(TextView)findViewById(R.id.header_text);
        image_table=(TableLayout)findViewById(R.id.image_table);

        header_text.setText("Image Table");
        header_left_btn.setText("Select");
        header_right_btn.setText("Clear");
        registerForContextMenu(header_left_btn);

        header_left_btn.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) 
            {
                // TODO Auto-generated method stub
                openContextMenu(header_left_btn);
            }
        });

        header_right_btn.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) 
            {
                // TODO Auto-generated method stub
                image_list.clear();
                image_drawable.clear();
                deletePhotos();
                updateImageTable();
            }
        });
    }

    public void deletePhotos()
    {
        String folder=Environment.getExternalStorageDirectory() +"/LoadImg";
        File f=new File(folder);
        if(f.isDirectory())
        {
            File[] files=f.listFiles();
            Log.v("Load Image", "Total Files To Delete=====>>>>>"+files.length);
            for(int i=0;i<files.length;i++)
            {
                String fpath=folder+File.separator+files[i].getName().toString().trim();
                System.out.println("File Full Path======>>>"+fpath);
                File nf=new File(fpath);
                if(nf.exists())
                {
                    nf.delete();
                }
            }
        }
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
    {

        super.onCreateContextMenu(menu, v, menuInfo);
        menu.setHeaderTitle("Post Image");
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.camer_menu, menu);
    }

    @Override
    public boolean onContextItemSelected(MenuItem item)
    {
      switch (item.getItemId())
      {
          case R.id.take_photo:
              //Toast.makeText(context, "Selected Take Photo", Toast.LENGTH_SHORT).show();
              takePhoto();
              break;

          case R.id.choose_gallery:
              //Toast.makeText(context, "Selected Gallery", Toast.LENGTH_SHORT).show();
              Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
              photoPickerIntent.setType("image/*");
              startActivityForResult(photoPickerIntent, 1);

              break;

          case R.id.share_cancel:
              closeContextMenu();
              break;
          default:
            return super.onContextItemSelected(item);
      }
      return true;
    }

    public void takePhoto() 
    {
         Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
         File folder = new File(Environment.getExternalStorageDirectory() + "/LoadImg");

         if(!folder.exists())
         {
             folder.mkdir();
         }         
         final Calendar c = Calendar.getInstance();
         String new_Date= c.get(Calendar.DAY_OF_MONTH)+"-"+((c.get(Calendar.MONTH))+1)   +"-"+c.get(Calendar.YEAR) +" " + c.get(Calendar.HOUR) + "-" + c.get(Calendar.MINUTE)+ "-"+ c.get(Calendar.SECOND);
         path=String.format(Environment.getExternalStorageDirectory() +"/LoadImg/%s.png","LoadImg("+new_Date+")");
         File photo = new File(path); 
         intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(photo));
         startActivityForResult(intent, 2);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) 
    {
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode==1)
        {
            Uri photoUri = data.getData();
            if (photoUri != null)
            {
                String[] filePathColumn = {MediaStore.Images.Media.DATA};
                Cursor cursor = getContentResolver().query(photoUri, filePathColumn, null, null, null);
                cursor.moveToFirst();
                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                String filePath = cursor.getString(columnIndex);
                cursor.close();
                Log.v("Load Image", "Gallery File Path=====>>>"+filePath);
                image_list.add(filePath);
                Log.v("Load Image", "Image List Size=====>>>"+image_list.size());

                //updateImageTable();
                new GetImages().execute();
            }
        }

        if(requestCode==2)
        {
            Log.v("Load Image", "Camera File Path=====>>>"+path);
            image_list.add(path);
             Log.v("Load Image", "Image List Size=====>>>"+image_list.size());
            //updateImageTable();
             new GetImages().execute();
        }
    }

    public void updateImageTable()
    {
        image_table.removeAllViews();

        if(image_drawable.size() > 0)
        {
            for(int i=0; i<image_drawable.size(); i++)
            {
                TableRow tableRow=new TableRow(this);
                tableRow.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
                tableRow.setGravity(Gravity.CENTER_HORIZONTAL);
                tableRow.setPadding(5, 5, 5, 5);
                for(int j=0; j<1; j++)
                {
                    ImageView image=new ImageView(this);
                    image.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

                    /*Bitmap bitmap = BitmapFactory.decodeFile(image_list.get(i).toString().trim());
                    bitmap = Bitmap.createScaledBitmap(bitmap,500, 500, true);
                    Drawable d=loadImagefromurl(bitmap);*/
                    image.setBackgroundDrawable(image_drawable.get(i));

                    tableRow.addView(image, 200, 200);
                }
                image_table.addView(tableRow);
            }
        }
    }

    public Drawable loadImagefromurl(Bitmap icon)
    {
        Drawable d=new BitmapDrawable(icon);        
        return d;
    }

    public class GetImages extends AsyncTask<Void, Void, Void> 
    {
        public ProgressDialog progDialog=null;

        protected void onPreExecute() 
        {
            progDialog=ProgressDialog.show(context, "", "Loading...",true);
        }
        @Override
        protected Void doInBackground(Void... params) 
        {
            image_drawable.clear();
            for(int i=0; i<image_list.size(); i++)
            {
                Bitmap bitmap = BitmapFactory.decodeFile(image_list.get(i).toString().trim());
                bitmap = Bitmap.createScaledBitmap(bitmap,500, 500, true);
                Drawable d=loadImagefromurl(bitmap);

                image_drawable.add(d);
            }
            return null;
        }    

        protected void onPostExecute(Void result) 
        {
            if(progDialog.isShowing())
            {
                progDialog.dismiss();
            }
            updateImageTable();
        }
    }
}

我从以下链接获得此代码：http: //tjkannan.blogspot.in/2012/01/load-image-from-camera-or-gallery.html

希望这会帮助你 。

于 2012-11-06T08:32:54.103 回答