安卓文件选择器选择一个文件并得到路径

使用系统自带的文件管理器进行文件的浏览和选择具体实现如下：

1、先看效果图：

2、添加文件浏览功能的库文件jar

这个库文件在这里提供：
afilechooser.zip

3、主要代码如下：

package com.nguhyw.chooserfile;



import com.ipaulpro.afilechooser.utils.FileUtils;

import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

    private static final String TAG = "FileChooserExampleActivity";
    private static final int REQUEST_CODE = 6384;
    private Button btnSelect;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnSelect = (Button) findViewById(R.id.btnSelect);
        btnSelect.setOnClickListener(new View.OnClickListener() {

            public void onClick(View arg0) {
                showChooser();
            }
        });


    }
     private void showChooser() {
        // Use the GET_CONTENT intent from the utility class
        Intent target = FileUtils.createGetContentIntent();
        // Create the chooser Intent
        Intent intent = Intent.createChooser(
                target, getString(R.string.chooser_title));
        try {
            startActivityForResult(intent, REQUEST_CODE);
        } catch (ActivityNotFoundException e) {
            // The reason for the existence of aFileChooser
        }
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case REQUEST_CODE:
                // If the file selection was successful
                if (resultCode == RESULT_OK) {
                    if (data != null) {
                        // Get the URI of the selected file
                        final Uri uri = data.getData();
                        Log.i(TAG, "Uri = " + uri.toString());
                        try {
                            // Get the file path from the URI
                            final String path = FileUtils.getPath(this, uri);
                            Toast.makeText(MainActivity.this,
                                    "File Selected: " + path, Toast.LENGTH_LONG).show();
                        } catch (Exception e) {
                            Log.e("FileSelectorTestActivity", "File select error", e);
                        }
                    }
                }
                break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }


}

布局文件：

<LinearLayout xmlns:android=""
    xmlns:tools=""
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
     >

    <Button
        android:id="@+id/btnSelect"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="172dp"
        android:text="选择文件" />

</LinearLayout>

最重要的一点Manifest.xml文件中一定要添加权限不然会读取不到或者读取不完整：

android:exported="true"绝对不能少。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android=""
    package="com.nguhyw.chooserfile"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.nguhyw.chooserfile.MainActivity"
            android:label="@string/app_name"
            android:exported="true" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

3、工程文件：
文件选择器.zip