android开发权限询问的示例代码
现在基于信息安全问题，特别是版本是23以上权限越严格。
特别是拍照，读，写权限
一般权限允许过，下次就不用询问了的，所以很多应用都喜欢在首页或者启动页直接询问，不允许的就用不了1、下面给出封装好的类，至于什么时候调看项目需要
publicclassEasyPermissions{
privatestaticfinalStringTAG="EasyPermissions";
publicinterfacePermissionCallbacksextends
ActivityCompat.OnRequestPermissionsResultCallback{
voidonPermissionsGranted(Listperms);
voidonPermissionsDenied(Listperms);
}
/**
*Checkifthecallingcontexthasasetofpermissions.
*
*@paramcontextthecallingcontext.
*@parampermsoneoremorepermissions,suchas{@codeandroid.Manifest.permission.CAMERA}.
*@returntrueifallpermissionsarealreadygranted,falseifatleastonepermission
*isnotyetgranted.
*/
publicstaticbooleanhasPermissions(Contextcontext,String...perms){
for(Stringperm:perms){
booleanhasPerm=(ContextCompat.checkSelfPermission(context,perm)==PackageManager.PERMISSION_GRANTED);
if(!hasPerm){
returnfalse;
}
}
returntrue;
}
/**
*Requestasetofpermissions,showingrationaleifthesystemrequestsit.
*
*@paramobjectActivityorFragmentrequestingpermissions.Shouldimplement
*{@linkActivityCompat.OnRequestPermissionsResultCallback}
*or
*{@linkandroid.support.v13.app.FragmentCompat.OnRequestPermissionsResultCallback}
*@paramrationaleamessageexplainingwhytheapplicationneedsthissetofpermissions,will
*bedisplayediftheuserrejectstherequestthefirsttime.
*@paramrequestCoderequestcodetotrackthisrequest,mustbe<256.
*@parampermsasetofpermissionstoberequested.
*/
publicstaticvoidrequestPermissions(finalObjectobject,Stringrationale,
finalintrequestCode,finalString...perms){
requestPermissions(object,rationale,
android.R.string.ok,
android.R.string.cancel,
requestCode,perms);
}
/**
*Requestasetofpermissions,showingrationaleifthesystemrequestsit.
*
*@paramobjectActivityorFragmentrequestingpermissions.Shouldimplement
*{@linkActivityCompat.OnRequestPermissionsResultCallback}
*or
*{@linkandroid.support.v13.app.FragmentCompat.OnRequestPermissionsResultCallback}
*@paramrationaleamessageexplainingwhytheapplicationneedsthissetofpermissions,will
*bedisplayediftheuserrejectstherequestthefirsttime.
*@parampositiveButtoncustomtextforpositivebutton
*@paramnegativeButtoncustomtextfornegativebutton
*@paramrequestCoderequestcodetotrackthisrequest,mustbe<256.
*@parampermsasetofpermissionstoberequested.
*/
publicstaticvoidrequestPermissions(finalObjectobject,Stringrationale,
@StringResintpositiveButton,
@StringResintnegativeButton,
finalintrequestCode,finalString...perms){
checkCallingObjectSuitability(object);
booleanshouldShowRationale=false;
for(Stringperm:perms){
shouldShowRationale=shouldShowRationale||shouldShowRequestPermissionRationale(object,perm);
}
if(shouldShowRationale){
//弹框询问
AlertDialogdialog=newAlertDialog.Builder(getActivity(object))
.setMessage(rationale)
.setPositiveButton(positiveButton,newDialogInterface.OnClickListener(){
@Override
publicvoidonClick(DialogInterfacedialog,intwhich){
executePermissionsRequest(object,perms,requestCode);
}
})
.setNegativeButton(negativeButton,newDialogInterface.OnClickListener(){
@Override
publicvoidonClick(DialogInterfacedialog,intwhich){
//Donothing,userdoesnotwanttorequest
PermissionCallbackscallbacks=(PermissionCallbacks)object;
if(callbacks!=null){
callbacks.onPermissionsDenied(newArrayList());
}
}
}).create();
dialog.show();
}else{
executePermissionsRequest(object,perms,requestCode);
}
}
/**
*Handletheresultofapermissionrequest,shouldbecalledfromthecallingActivity's
*{@linkActivityCompat.OnRequestPermissionsResultCallback#onRequestPermissionsResult(int,String[],int[])}
*method.
*
*Ifanypermissionsweregrantedordenied,theActivitywillreceivetheappropriate
*callbacksthrough{@linkPermissionCallbacks}andmethodsannotatedwith
*{@linkAfterPermissionGranted}willberunifappropriate.
*
*@paramrequestCoderequestCodeargumenttopermissionresultcallback.
*@parampermissionspermissionsargumenttopermissionresultcallback.
*@paramgrantResultsgrantResultsargumenttopermissionresultcallback.
*@paramobjectthecallingActivityorFragment.
*@throwsIllegalArgumentExceptionifthecallingActivitydoesnotimplement
*{@linkPermissionCallbacks}.
*/
publicstaticvoidonRequestPermissionsResult(intrequestCode,String[]permissions,
int[]grantResults,Objectobject){
checkCallingObjectSuitability(object);
PermissionCallbackscallbacks=(PermissionCallbacks)object;
//Makeacollectionofgrantedanddeniedpermissionsfromtherequest.
ArrayListgranted=newArrayList<>();
ArrayListdenied=newArrayList<>();
for(inti=0;i0){
thrownewRuntimeException("Cannotexecutenon-voidmethod"+method.getName());
}
try{
//Makemethodaccessibleifprivate
if(!method.isAccessible()){
method.setAccessible(true);
}
method.invoke(object);
}catch(IllegalAccessExceptione){
ILogger.e(TAG,"runDefaultMethod:IllegalAccessException",e);
}catch(InvocationTargetExceptione){
ILogger.e(TAG,"runDefaultMethod:InvocationTargetException",e);
}
}
}
}
}
privatestaticvoidcheckCallingObjectSuitability(Objectobject){
//MakesureObjectisanActivityorFragment
if(!((objectinstanceofFragment)||(objectinstanceofActivity))){
thrownewIllegalArgumentException("CallermustbeanActivityoraFragment.");
}
//MakesureObjectimplementscallbacks
if(!(objectinstanceofPermissionCallbacks)){
thrownewIllegalArgumentException("CallermustimplementPermissionCallbacks.");
}
}}
注：这个类不是我写的，分享给大家
2、调用示例（activity或fragment）：（方法调用的时机随你）
privatevoidrequestGalleryPermission(){
//权限参数可以添加很多，不固定参数的
if(EasyPermissions.hasPermissions(this,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE)){
getPhotos();//如果具有权限做的操作
}else{
//Askforonepermission
EasyPermissions.requestPermissions(this,getString(R.string.permissions_tips_gallery),
GalleryFinal.PERMISSIONS_CODE_GALLERY,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE);
}
}
3、拒绝和允许做的操作（activity或fragment）：
@Override publicvoidonPermissionsGranted(Listlist){ //允许 getPhotos(); } @Override publicvoidonPermissionsDenied(List list){ //拒绝 mTvEmptyView.setText(R.string.permissions_denied_tips); //mIvTakePhoto.setVisibility(View.GONE); }
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。