Intent 打开文件浏览器，返回后得到文件路径

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.demo.gudd.selectmusic.MainActivity">

<Button
android:id="@+id/open"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="打开文件"/>

<TextView
android:id="@+id/showPath"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/open"/>
</RelativeLayout>

package com.demo.gudd.selectmusic;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private TextView showPath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button open = (Button) findViewById(R.id.open);
showPath = (TextView) findViewById(R.id.showPath);
open.setOnClickListener(this);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
String  mFilePath = Uri.decode(data.getDataString());
//通过data.getDataString()得到的路径如果包含中文路径，则会出现乱码现象，经过Uri.decode()函数进行解码，得到正确的路径。但是此时路径为Uri路径，必须转换为String路径，网上有很多方法，本人通过对比发现，Uri路径里多了file：//字符串，所以采用以下方法将前边带的字符串截取掉，获得String路径，可能通用性不够好，下一步会学习更好的方法。
mFilePath = mFilePath.substring(7, mFilePath.length());
showPath.setText(mFilePath);
}
super.onActivityResult(requestCode, resultCode, data);
}

@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.open:
// 打开系统文件浏览功能
Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent,1);
break;
}
}
}