Intent.createChooser文件选择

实现点击Button选择文件, 在TextView上显示Uri

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:paddingBottom="@dimen/activity_vertical_margin"
 6     android:paddingLeft="@dimen/activity_horizontal_margin"
 7     android:paddingRight="@dimen/activity_horizontal_margin"
 8     android:paddingTop="@dimen/activity_vertical_margin"
 9     tools:context="com.example.filetest.MainActivity" >
10 
11     <TextView
12         android:id="@+id/textView_uri"
13         android:layout_width="wrap_content"
14         android:layout_height="wrap_content"
15         android:text="@string/hello_world" />
16     <Button
17         android:id="@+id/btn_find"
18         android:layout_width="match_parent"
19         android:layout_height="wrap_content"
20         android:layout_below="@+id/textView_uri"
21         android:text="find"/>
22 
23 </RelativeLayout>

 1 package com.example.filetest;
 2 
 3 import android.app.Activity;
 4 import android.content.Intent;
 5 import android.net.Uri;
 6 import android.os.Bundle;
 7 import android.view.Menu;
 8 import android.view.MenuItem;
 9 import android.view.View;
10 import android.view.View.OnClickListener;
11 import android.widget.Button;
12 import android.widget.TextView;
13 
14 
15 public class MainActivity extends Activity {
16 
17     protected static final int FILE_SELECT_CODE = 0;
18     private Button button;
19     private TextView textView;
20     
21     @Override
22     protected void onCreate(Bundle savedInstanceState) {
23         super.onCreate(savedInstanceState);
24         setContentView(R.layout.activity_main);
25         
26         button = (Button)findViewById(R.id.btn_find);
27         textView = (TextView)findViewById(R.id.textView_uri);
28         
29         button.setOnClickListener(new OnClickListener() {
30             @Override
31             public void onClick(View v) {
32                 // TODO Auto-generated method stub
33                 Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
34                 intent.setType("*/*");  // 选择文件类型
35                 intent.addCategory(Intent.CATEGORY_OPENABLE);
36                 startActivityForResult( Intent.createChooser(intent, "Select a File to Upload"), FILE_SELECT_CODE);
37             }
38         });
39     }
40 
41     @Override
42     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
43         // TODO Auto-generated method stub
44         switch(requestCode){
45             case FILE_SELECT_CODE:
46                 if(resultCode == RESULT_OK){
47                     Uri uri = data.getData();
48                     String path = uri.getPath();
49                     textView.setText(path);
50                 }
51                 break;
52         }
53         super.onActivityResult(requestCode, resultCode, data);
54     }
55 }