Android 6.0許可權問題之Dexter庫的使用
阿新 • • 發佈：2019-02-19
1.build.gradle中新增
dependencies{
compile 'com.karumi:dexter:2.2.2'
}2.application中初始化
public MyApplication extends Application {
@Override public void onCreate() {
super.onCreate();
Context context=getApplicationContext();
Dexter.initialize(context);
}
}Dexter.isRequestOngoing() 判斷是否之前有許可權請求的操作沒被處理
Dexter.checkPermission(PermissionListener listener, String permission) 請求許可權方法
PermissionListener listener為處理許可權請求的回撥介面，String permission為請求的許可權
if(Build.VERSION.SDK_INT >= 23){ if (Dexter.isRequestOngoing()) { return; } Dexter.checkPermission(ForumFragment.this, Manifest.permission.READ_EXTERNAL_STORAGE); }else{ startActivity(new Intent(getActivity(),SendPhotoActivity.class)); }
4.在需要請求許可權操作的類中實現PermissionListener的介面，實現三個方法
使用者允許許可權
@Override
public void onPermissionGranted(PermissionGrantedResponse response) {
} @Override
public void onPermissionDenied(PermissionDeniedResponse response) {
}使用者不允許許可權，向用戶解釋許可權左右
@Override public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) { }
完整程式碼：
import android.Manifest;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.administrator.myannotation.R;
import com.example.administrator.myannotation.activity.SendPhotoActivity;
import com.example.administrator.myannotation.base.BaseFragment;
import com.karumi.dexter.Dexter;
import com.karumi.dexter.PermissionToken;
import com.karumi.dexter.listener.PermissionDeniedResponse;
import com.karumi.dexter.listener.PermissionGrantedResponse;
import com.karumi.dexter.listener.PermissionRequest;
import com.karumi.dexter.listener.single.PermissionListener;
/**
* Created by admin on 2016/6/22.
*/
public class ForumFragment extends BaseFragment implements PermissionListener{
FloatingActionButton fab;
public static ForumFragment getInstance(int s){
ForumFragment fragment = new ForumFragment();
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_forum, container, false);
setImmerseLayoutColor(view);
initdata(view);
return view;
}
private void initdata(View view){
fab=(FloatingActionButton)view.findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// startActivity(new Intent(getActivity(),SendPhotoActivity.class));
if(Build.VERSION.SDK_INT >= 23) {
//判斷是否有許可權請求沒被處理
if (Dexter.isRequestOngoing()) {
return;
}
//請求許可權
Dexter.checkPermission(ForumFragment.this, Manifest.permission.READ_EXTERNAL_STORAGE);
}else{
startActivity(new Intent(getActivity(),SendPhotoActivity.class));
}
}
});
}
@Override
public void onPermissionGranted(PermissionGrantedResponse response) {
startActivity(new Intent(getActivity(),SendPhotoActivity.class));
}
@Override
public void onPermissionDenied(PermissionDeniedResponse response) {
showDeniedDialog();
}
@Override
public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {
showRationaleShouldBeShownDialog(token);
}
/**
* 使用者不允許許可權，向用戶說明許可權的重要性，並支援使用者去設定中開啟許可權
*/
private void showDeniedDialog(){
new AlertDialog.Builder(getActivity()).setTitle("請允許獲取儲存空間")
.setMessage("無法獲取此許可權，不能正常工作")
.setNegativeButton("拒絕", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.setPositiveButton("去設定", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent();
intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
intent.setData(Uri.parse("package:"+getActivity().getPackageName()));
intent.putExtra("cmp", "com.android.settings/.applications.InstalledAppDetails");
intent.addCategory("android.intent.category.DEFAULT");
getContext().startActivity(intent);
dialog.dismiss();
}
})
.show();
}
/**
* 使用者不允許許可權，向用戶說明許可權的重要性
* @param token
*/
private void showRationaleShouldBeShownDialog(final PermissionToken token){
new AlertDialog.Builder(getActivity()).setTitle("提示")
.setMessage("獲取相簿需要儲存空間的許可權，不開啟將無法正常工作！")
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
token.cancelPermissionRequest();
}
})
.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
token.continuePermissionRequest();
}
})
.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override public void onDismiss(DialogInterface dialog) {
token.cancelPermissionRequest();
}
})
.show();
}
} }在小米6.0上測試結果：
請求許可權時，彈出系統的請求許可權dialog
1.使用者允許，進入方法onPermissionGranted()
2.使用者不允許，進入方法onPermissionDenied()
使用者->拒絕，下次請求許可權時直接進入方法onPermissionDenied()
使用者->去設定，進入該應用的應用資訊，使用者自己開啟許可權
3.使用者允許，之後去應用資訊中關閉許可權，下次請求許可權時進入方法onPermissionRationaleShouldBeShown()
使用者->確定,彈出系統的請求許可權dialog
使用者->取消，進入方法onPermissionDenied()