通过Intent获取Sdcard上的图片，并加以利用

废话不多刷

主要运用的是Intent的Intent.ACTION_GET_CONTENT

看java代码

package com.example.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity{
	private int imageRequestCode=777;
	private ImageView iv;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}
//	这个是通过Intent打开图片浏览器，并获取选中后的图片，加以利用。
	public void andbase_test(View view){
		Intent intent =new Intent(Intent.ACTION_GET_CONTENT);
		intent.setType("image/*");
//		startActivityForResult(Intent.createChooser(intent, "请选择："),imageRequestCode);
		startActivityForResult(intent, imageRequestCode);
	}
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		// TODO Auto-generated method stub
		super.onActivityResult(requestCode, resultCode, data);
		
		if(imageRequestCode==requestCode){
			
			Uri uri=data.getData();
			Toast.makeText(MainActivity.this, uri.getPath()+"...............", 0).show();
			TextView tv=(TextView) findViewById(R.id.tv);
			tv.setText(uri.toString());
			
			ContentResolver cr = this.getContentResolver();

			Cursor cursor = cr.query(uri, null, null, null, null);

			cursor.moveToFirst();

			for (int i = 0; i < cursor.getColumnCount(); i++) {

				System.out.println(i+"-----------------"+cursor.getString(i));
				
//			　　这个可以遍历cursor，其中_data字段 就是图片的物理路径
			}
			String imagePath=cursor.getString(cursor.getColumnIndex("_data"));
			System.out.println("==================="+imagePath);
			
			try {
				InputStream is=new FileInputStream(new File(imagePath));
				iv = (ImageView) findViewById(R.id.iv);
				Bitmap bm=BitmapFactory.decodeStream(is);
				iv.setImageBitmap(bm);
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}

xml代码：

<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" >

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="bbbbbbbbbbbbbbbbbbbbbbbbbbbbb" />

	<Button
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:text="andbase_test"
	    android:onClick="andbase_test"
	    />
	
	<ImageView 
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:src="@drawable/ic_launcher"
	    android:id="@+id/iv"
	    />
</LinearLayout>

尽情参考，写成blog以备自用，不喜勿喷。