简述
本文简要记录运行时权限注意点
1、检查是否具有某种权限
// 如检查是否具有相机权限....
ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
// Packmanager 常量
// 授权
public static final int PERMISSION_GRANTED = 0;
// 未授权
public static final int PERMISSION_DENIED = -1;
2、申请权限
// 123自定义的返回码
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.CAMERA},123);
3、用户拒绝权限显示UI让用户去申请
1.如果应用之前请求过此权限但用户拒绝了请求，此方法将返回 true
2.如果用户在过去拒绝了权限请求，并在权限请求系统对话框中选择了 Don’t ask again 选项，此方法将返回 false
用户之前已经拒绝了，但是该应用需要某种权限，需要提示用户去选择
ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.CAMERA)
4、权限申请回调
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 123){
// 权限拒绝
if (grantResults[0] != PackageManager.PERMISSION_GRANTED){
if (!ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA)){
// 点击了不再询问弹窗
Log.e("权限", "不再询问处理....." );
}else {
// 普通的拒绝
finish();
}
}else {
// 同意权限申请的分支
detailInAction();
}
}
}
5、跳转到该应用的设置界面
/**
* 跳转到设置权限的界面
* */
public void getAppDetailSettingIntent() {
// 可以看下这篇文章
// https://blog.csdn.net/cbbbc/article/details/60148864
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if (Build.VERSION.SDK_INT >= 9) {
intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
intent.setData(Uri.fromParts("package", getPackageName(), null));
} else if (Build.VERSION.SDK_INT <= 8) {
intent.setAction(Intent.ACTION_VIEW);
intent.setClassName("com.android.settings", "com.android.settings.InstalledAppDetails");
intent.putExtra("com.android.settings.ApplicationPkgName", getPackageName());
}
startActivity(intent);
}
完整的例子
/**
* @author crazyZhangxl on 2018-11-16 8:15:09.
* Describe: 闪屏页
*/
public class SplashActivity extends BaseActivity {
@Override
protected void init() {
}
@Override
protected int provideContentViewId() {
return 0;
}
@Override
protected BasePresenter createPresenter() {
return null;
}
@Override
protected void initView(Bundle savedInstanceState) {
if (checkAndRequestPermission()){
detailInAction();
}
}
private void detailInAction(){
// 进行判断进行页面跳转
if ((getIntent().getFlags() & Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT) != 0) {
finish();
return;
}
if (TextUtils.isEmpty(UserCache.getAuthorization())){
LoginActivity.show(SplashActivity.this);
}else {
IndexActivity.show(SplashActivity.this);
}
// 再关闭啊
finish();
}
@Override
protected void initData() {
}
@Override
protected void initListener() {
}
@Override
protected void onResume() {
super.onResume();
Log.e("权限", "onResume: ");
}
@Override
protected void onRestart() {
super.onRestart();
Log.e("权限", "onRestart: ");
if (checkAndRequestPermission()){
detailInAction();
}
}
private boolean checkAndRequestPermission(){
int permission = ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
// "不再询问"不会进入该循环，勾选该表示已经"授权"
if (permission != PackageManager.PERMISSION_GRANTED){
if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.CAMERA)){
// 用户拒绝过 但是未勾选不再询问
showPSMaterialDialog(null, "需要开启大桥对您手机的相机权限才能下载安装，是否现在开启", "确定", "取消",
new MaterialDialog.SingleButtonCallback() {
@Override
public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
dialog.dismiss();
ActivityCompat.requestPermissions(SplashActivity.this,new String[]{Manifest.permission.CAMERA},123);
}
}, new MaterialDialog.SingleButtonCallback() {
@Override
public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
dialog.dismiss();
finish();
}
});
}else {
// 首次检查权限
// 如果不再询问 不会执行...
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.CAMERA},123);
}
return false;
}
return true;
}
// onResume
// onRequestPermissionsResult
// onResume
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
Log.e("权限", "onRequestPermissionsResult: " );
if (requestCode == 123){
if (grantResults[0] != PackageManager.PERMISSION_GRANTED){
// 点击了不再询问 返回的结果为false.... =>
// 由于用户点击了不再询问且拒绝 需要用户手动去用户设置里开启
if (!ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA)){
// 弹窗 提示用户去设置
showPSMaterialDialog(null,
"使用应用前需要获取您的相机的使用权限。\n操作路径：设置->应用->延长->权限", "去设置", "取消",
(dialog, which) -> {
dialog.dismiss();
// 跳转向应用设置页面
SplashActivity.this.getAppDetailSettingIntent();
}, (dialog, which) -> {
dialog.dismiss();
SplashActivity.this.finish();
});
}else {
finish();
}
}else {
detailInAction();
}
}
}
}