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public class PermissionUtils extends AppCompatActivity {
private static final int PERMISSON_REQUESTCODE = 0;
/**
* 需要进行检测的权限数组
*/
protected String[] needPermissions = {
Manifest.permission.CAMERA,
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
/**
* 返回true 已经开启了需要的权限 false 未开启权限
* @param permissions
* @return
*/
public boolean checkPermissions(String... permissions) {
if (Build.VERSION.SDK_INT >= 23
&& getApplicationInfo().targetSdkVersion >= 23) {
List<String> needRequestPermissonList = findDeniedPermissions(permissions);
if (null != needRequestPermissonList
&& needRequestPermissonList.size() > 0) {
try {
String[] array = needRequestPermissonList.toArray(new String[needRequestPermissonList.size()]);
Method method = getClass().getMethod("requestPermissions", new Class[]{String[].class, int.class});
method.invoke(this, array, PERMISSON_REQUESTCODE);
return false;
} catch (Exception e) {
return false;
}
} else {
return true;
}
} else {
return true;
}
}
/**
* 获取权限集中需要申请权限的列表
*
* @param permissions
* @return
*/
private List<String> findDeniedPermissions(String[] permissions) {
List<String> needRequestPermissonList = new ArrayList<String>();
try {
for (String perm : permissions) {
Method checkSelfMethod = getClass().getMethod("checkSelfPermission", String.class);
Method shouldShowRequestPermissionRationaleMethod = getClass().getMethod("shouldShowRequestPermissionRationale",
String.class);
if ((Integer) checkSelfMethod.invoke(this, perm) != PackageManager.PERMISSION_GRANTED
|| (Boolean) shouldShowRequestPermissionRationaleMethod.invoke(this, perm)) {
needRequestPermissonList.add(perm);
}
}
} catch (Throwable e) {
}
return needRequestPermissonList;
}
/**
* 检测是否所有的权限都已经授权
*
* @param grantResults
* @return
*/
private boolean verifyPermissions(int[] grantResults) {
for (int result : grantResults) {
if (result != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}
private PermissionListener mPermissionListener;
public interface PermissionListener {
void noPermission();
void hasPermission();
}
/**
* 设置权限监听
* @param permissonListener
*/
public void setPermissonListener(PermissionListener permissonListener) {
this.mPermissionListener = permissonListener;
}
@TargetApi(23)
public void onRequestPermissionsResult(int requestCode,
String[] permissions, int[] paramArrayOfInt) {
if (requestCode == PERMISSON_REQUESTCODE) {
if (!verifyPermissions(paramArrayOfInt)) {
showMissingPermissionDialog();
mPermissionListener.noPermission();
} else {
mPermissionListener.hasPermission();
}
}
}
/**
* 显示提示信息
*/
private void showMissingPermissionDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("提示");
builder.setMessage("当前应用缺少必要权限。请点击设置,开启所有权限");
builder.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setPositiveButton("设置",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
startAppSettings();
}
});
builder.setCancelable(false);
builder.show();
}
/**
* 启动应用的设置
*/
private void startAppSettings() {
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
intent.setData(Uri.parse("package:" + getPackageName()));
startActivity(intent);
}
}