Android Permissions管理之用户拒绝授权，在Marshmallow之前的安卓版本，应用的权限只需要注册一下，应用就会获取到，在Marshmallow之后，为了安全，全新的权限模型出现，每次使用对应权限的时候，都会弹出 是否让应用获取权限的弹框。如果，用户点击是，给应用授权，那么一切都这样美好的进行就行，如果点击否，拒绝应用的授权，那么一切不美丽的事情就这样开始了，除非用户去设置里面设置给应用权限，那样应用才会正常进行，但是，很遗憾，大部分用户都不会设置这样操作的，繁琐，麻烦。那么解决方案就是每次需要的时候给用户弹出是否给应用授权。
代码如下：
package com.stylingandroid.permissions;
import android.Manifest;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_CODE = 0;
private static final String[] PERMISSIONS = new String[]{Manifest.permission.RECORD_AUDIO, Manifest.permission.MODIFY_AUDIO_SETTINGS};
private PermissionsChecker checker;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
checker = new PermissionsChecker(this);
}
@Override
protected void onResume() {
super.onResume();
if (checker.lacksPermissions(PERMISSIONS)) {
startPermissionsActivity();
}
}
private void startPermissionsActivity() {
PermissionsActivity.startActivityForResult(this, REQUEST_CODE, PERMISSIONS);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE && resultCode == PermissionsActivity.PERMISSIONS_DENIED) {
finish();
}
}
}
package com.stylingandroid.permissions;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
public class PermissionsActivity extends AppCompatActivity {
public static final int PERMISSIONS_GRANTED = 0;
public static final int PERMISSIONS_DENIED = 1;
private static final String EXTRA_PERMISSIONS = "com.stylingandroid.permissions.EXTRA_PERMISSIONS";
private PermissionsChecker checker;
public static void startActivityForResult(Activity activity, int requestCode, String... permissions) {
Intent intent = new Intent(activity, PermissionsActivity.class);
intent.putExtra(EXTRA_PERMISSIONS, permissions);
ActivityCompat.startActivityForResult(activity, intent, requestCode, null);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_permissions);
checker = new PermissionsChecker(this);
}
@Override
protected void onResume() {
super.onResume();
String[] permissions = getPermissions();
if (checker.lacksPermissions(permissions)) {
requestPermissions(permissions);
} else {
allPermissionsGranted();
}
}
private String[] getPermissions() {
return getIntent().getStringArrayExtra(EXTRA_PERMISSIONS);
}
private void allPermissionsGranted() {
setResult(PERMISSIONS_GRANTED);
finish();
}
private void requestPermissions(String... permissions) {
//NO-OP
}
}
package com.stylingandroid.permissions;
import android.content.Context;
import android.content.pm.PackageManager;
import android.support.v4.content.ContextCompat;
class PermissionsChecker {
private final Context context;
public PermissionsChecker(Context context) {
this.context = context;
}
public boolean lacksPermissions(String... permissions) {
for (String permission : permissions) {
if (lacksPermission(permission)) {
return true;
}
}
return false;
}
private boolean lacksPermission(String permission) {
return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_DENIED;
}
}
from:https://github.com/StylingAndroid/Permissions
