GetPathFromUri4kitkat【Android 4.4 kitkat以上及以下根据uri获取路径的方法】

前言

在Android4.4之前和之后，通过Intent调用文件管理器选择文件，获取的文件uri地址形式是不同的。

Android6.0 content://com.android.providers.media.documents/document/image%3A593410

Android4.2.2 file:///storage/emulated/0/Pictures/Screenshots/Screenshot_2017-04-17-14-39-13.png

所以，当我们需要用到文件的绝对路径地址（/storage/emulated/0/Pictures/Screenshots/Screenshot_20170706-113240.png）的时候，则需要一个通用的方法。

效果图

Android 6.0	Android4.2.2

代码分析

一般使用getPath( context,uri)方法即可。

使用步骤

一、项目组织结构图

注意事项：

1、导入类文件后需要change包名以及重新import R文件路径

2、Values目录下的文件（strings.xml、dimens.xml、colors.xml等），如果项目中存在，则复制里面的内容，不要整个覆盖

二、导入步骤

将GetPathFromUri4kitkat.java文件复制到项目中

package com.why.project.getpathfromuri4kitkatdemo.utils;

import android.annotation.SuppressLint;

import android.content.ContentUris;

import android.content.Context;

import android.database.Cursor;

import android.net.Uri;

import android.os.Build;

import android.os.Environment;

import android.provider.DocumentsContract;

import android.provider.MediaStore;

import java.io.File;

/**

 * @CreateBy HaiyuKing

 * @Used Android 4.4 kitkat以上及以下根据uri获取路径的方法

 * @参考资料 http://www.2cto.com/kf/201502/376975.html

 */

public class GetPathFromUri4kitkat {

    /**

     * 专为Android4.4设计的从Uri获取文件绝对路径，以前的方法已不好使

     * @param uri - Android6.0 content://com.android.providers.media.documents/document/image%3A593410

     *            Android4.2.2 file:///storage/emulated/0/Pictures/Screenshots/Screenshot_2017-04-17-14-39-13.png

     * @return Android6.0 /storage/emulated/0/Pictures/Screenshots/Screenshot_20170706-113240.png

     *          Android4.2.2 /storage/emulated/0/Pictures/Screenshots/Screenshot_2017-04-17-14-39-13.png

     */

    @SuppressLint("NewApi")

    public static String getPath(final Context context, final Uri uri) {

        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

        // DocumentProvider

        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {

            // ExternalStorageProvider

            if (isExternalStorageDocument(uri)) {

                final String docId = DocumentsContract.getDocumentId(uri);

                final String[] split = docId.split(":");

                final String type = split[0];

                if ("primary".equalsIgnoreCase(type)) {

                    return Environment.getExternalStorageDirectory() + "/" + split[1];

                }

                // TODO handle non-primary volumes

            }

            // DownloadsProvider

            else if (isDownloadsDocument(uri)) {

                final String id = DocumentsContract.getDocumentId(uri);

                final Uri contentUri = ContentUris.withAppendedId(

                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

                return getDataColumn(context, contentUri, null, null);

            }

            // MediaProvider

            else if (isMediaDocument(uri)) {

                final String docId = DocumentsContract.getDocumentId(uri);

                final String[] split = docId.split(":");

                final String type = split[0];

                Uri contentUri = null;

                if ("image".equals(type)) {

                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

                } else if ("video".equals(type)) {

                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;

                } else if ("audio".equals(type)) {

                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;

                }

                final String selection = "_id=?";

                final String[] selectionArgs = new String[] { split[1] };

                return getDataColumn(context, contentUri, selection, selectionArgs);

            }

        }

        // MediaStore (and general)

        else if ("content".equalsIgnoreCase(uri.getScheme())) {

            return getDataColumn(context, uri, null, null);

        }

        // File

        else if ("file".equalsIgnoreCase(uri.getScheme())) {

            return uri.getPath();

        }

        return null;

    }

    /**

     * Get the value of the data column for this Uri. This is useful for

     * MediaStore Uris, and other file-based ContentProviders.

     *

     * @param context

     *            The context.

     * @param uri

     *            The Uri to query.

     * @param selection

     *            (Optional) Filter used in the query. 构造筛选语句

     * @param selectionArgs

     *            (Optional) Selection arguments used in the query.

     * @return The value of the _data column, which is typically a file path.

     */

    public static String getDataColumn(Context context, Uri uri, String selection,

            String[] selectionArgs) {

        Cursor cursor = null;

        //筛选列

        final String column = MediaStore.Files.FileColumns.DATA;//"_data"

        final String[] projection = { column };

        try {

            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,

                    null);

            if (cursor != null && cursor.moveToFirst()) {

                final int column_index = cursor.getColumnIndexOrThrow(column);

                return cursor.getString(column_index);

            }

        }catch (IllegalArgumentException e){

            //java.lang.IllegalArgumentException: column '_data' does not exist

            //华为的特殊处理：content://com.huawei.hidisk.fileprovider/root/storage/emulated/0/tencent/TIMfile_recv/xxx.doc

            String rootPre = File.separator + "root";// /root

            return uri.getPath().startsWith(rootPre) ? uri.getPath().replace(rootPre,"") : uri.getPath();

        } finally {

            if (cursor != null)

                cursor.close();

        }

        return null;

    }

    /**

     * @param uri

     *            The Uri to check.

     * @return Whether the Uri authority is ExternalStorageProvider.

     */

    public static boolean isExternalStorageDocument(Uri uri) {

        return "com.android.externalstorage.documents".equals(uri.getAuthority());

    }

    /**

     * @param uri

     *            The Uri to check.

     * @return Whether the Uri authority is DownloadsProvider.

     */

    public static boolean isDownloadsDocument(Uri uri) {

        return "com.android.providers.downloads.documents".equals(uri.getAuthority());

    }

    /**

     * @param uri

     *            The Uri to check.

     * @return Whether the Uri authority is MediaProvider.

     */

    public static boolean isMediaDocument(Uri uri) {

        return "com.android.providers.media.documents".equals(uri.getAuthority());

    }

}

GetPathFromUri4kitkat.java

在AndroidManifest.xml中添加权限

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

          package="com.why.project.getpathfromuri4kitkatdemo">

    <!-- ======================（GetPathFromUri4kitkat）========================== -->

    <!-- 向SD卡读取数据权限 -->

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>

            </intent-filter>

        </activity>

    </application>

</manifest>

添加运行时权限的处理（本demo中采用的是修改targetSDKVersion=22）

三、使用方法

package com.why.project.getpathfromuri4kitkatdemo;

import android.app.Activity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import com.why.project.getpathfromuri4kitkatdemo.utils.GetPathFromUri4kitkat;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    private Button btn_openFile;

    private TextView tv_filePath;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        initViews();

        initEvents();

    }

    private void initViews() {

        btn_openFile = (Button) findViewById(R.id.btn_openFile);

        tv_filePath = (TextView) findViewById(R.id.tv_filePath);

    }

    private void initEvents() {

        btn_openFile.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT);

                String IMAGE_UNSPECIFIED = "*/*";

                innerIntent.setType(IMAGE_UNSPECIFIED); // 查看类型

                Intent wrapperIntent = Intent.createChooser(innerIntent, "File Browser");

                MainActivity.this.startActivityForResult(wrapperIntent, 1111);

            }

        });

    }

    /*=========================================实现打开文件管理器功能==============================================*/

    @Override

    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        super.onActivityResult(requestCode, resultCode, data);

        Log.w(TAG, "{onActivityResult}resultCode=" + resultCode);

        Log.w(TAG, "{onActivityResult}requestCode=" + requestCode);

        if (resultCode == Activity.RESULT_OK) {

            //调用文件管理器选择文件的回调

            if (requestCode == 1111) {

                Uri result = data == null ? null : data.getData();

                Log.w(TAG, "{onActivityResult}result=" + result);

                tv_filePath.setText("Uri："+result.toString());

                String pathStr = GetPathFromUri4kitkat.getPath(MainActivity.this,result);

                Log.w(TAG, "{onActivityResult}pathStr=" + pathStr);

                tv_filePath.setText(tv_filePath.getText() + "\n\n" + "Path："+pathStr);

            }

        }

    }

}

混淆配置

无

参考资料

Android 4.4 kitkat以上及以下根据uri获取路径的方法

项目demo下载地址

https://github.com/haiyuKing/GetPathFromUri4kitkatDemo