适配Android8.0以后文件权限

适配Android8.0以后文件权限

一、资源文件res里面创建xml文件，并创建provider_paths.xml文件

provider_paths.xml文件代码如下：

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="external_files" path="."/>
</paths>

二、在清单文件中加入权限以及相应配置

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"
    tools:ignore="ProtectedPermissions" />

以下添加在application中

<provider
    android:name="androidx.core.content.FileProvider"
    android:authorities="${applicationId}.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths" />
</provider> 

三、动态请求权限

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Process;


import java.util.ArrayList;
import java.util.List;


public class PermissionAcitivity extends Activity {
    public static int PERMISSION_REQ = 0x123456;

    private String[] mPermission = new String[]{
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE
    };



    private List<String> mRequestPermission = new ArrayList<String>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
            for (String one : mPermission) {
                if (PackageManager.PERMISSION_GRANTED != this.checkPermission(one, Process.myPid(), Process.myUid())) {
                    mRequestPermission.add(one);
                }
            }
            if (!mRequestPermission.isEmpty()) {
                this.requestPermissions(mRequestPermission.toArray(new String[mRequestPermission.size()]), PERMISSION_REQ);
                return;
            }
        }
        startActiviy();
    }

    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        // 版本兼容
        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.M) {
            return;
        }
        if (requestCode == PERMISSION_REQ) {
            for (int i = 0; i < grantResults.length; i++) {
                for (String one : mPermission) {
                    if (permissions[i].equals(one) && grantResults[i] == PackageManager.PERMISSION_GRANTED) {
                        mRequestPermission.remove(one);
                    }
                }
            }
            startActiviy();
        }
    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == PERMISSION_REQ) {
            if (resultCode == 0) {
                this.finish();
            }
        }
    }

    public void startActiviy() {
        if (mRequestPermission.isEmpty()) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    PermissionAcitivity.this.runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Intent intent=null;
                            intent = new Intent(PermissionAcitivity.this, MainActivity.class);
                            startActivity(intent);
                            finish();
                        }
                    });
                }
            }).start();
        } else {

            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    PermissionAcitivity.this.finish();
                }
            }, 3000);
        }
    }

}

本文地址：https://blog.csdn.net/liuyi1234liuyi/article/details/110661700