启动应用程序时出现启动画面。因此，在显示初始屏幕时，应显示运行时权限。我从github下面获得了这段代码。但是没有显示运行时权限。初始屏幕工作正常，但是在下面添加此代码时，运行时权限不起作用。我已经添加了读取短信，读取外部存储，访问位置的权限。我还在清单文件中赋予了所有这些权限。
public class SplashActivity extends AppCompatActivity {
String loginstatus;
final private int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 124;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splashfile);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
Intent i = new Intent(SplashActivity.this, LoginActivity.class);
startActivity(i);
finish();
}
}, 3000);
/* Thread background = new Thread() {
public void run() {
try {
// Thread will sleep for 10 seconds
sleep(4*1000);
startActivity(new Intent(SplashScreen.this,HomeActivity.class));
finish();
} catch (Exception e) {
}
}
};
// start thread
background.start();*/
}
private void permissioncheck() {
List<String> permissionsNeeded = new ArrayList<String>();
final List<String> permissionsList = new ArrayList<String>();
if (!addPermission(permissionsList, Manifest.permission.READ_EXTERNAL_STORAGE))
permissionsNeeded.add("READ");
if (!addPermission(permissionsList, Manifest.permission.ACCESS_COARSE_LOCATION))
permissionsNeeded.add("COURLOC");
if (!addPermission(permissionsList, Manifest.permission.ACCESS_FINE_LOCATION))
permissionsNeeded.add("FINELOC");
if (!addPermission(permissionsList, Manifest.permission.READ_SMS))
permissionsNeeded.add("SMS");
if (permissionsList.size() > 0) {
if (permissionsNeeded.size() > 0) {
// Need Rationale
String message = "You need to grant access to " + permissionsNeeded.get(0);
for (int i = 1; i < permissionsNeeded.size(); i++)
message = message + ", " + permissionsNeeded.get(i);
showMessageOKCancel(message,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (Build.VERSION.SDK_INT >= 23) {
// Marshmallow+
requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
} else {
// Pre-Marshmallow
}
}
});
return;
}
if (Build.VERSION.SDK_INT >= 23) {
// Marshmallow+
requestPermissions(permissionsList.toArray(new String[permissionsList.size()]),
REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
} else {
// Pre-Marshmallow
}
return;
}else
{
// Toast.makeText(this,"Permission",Toast.LENGTH_LONG).show();
LaunchApp();
}
//insertDummyContact();
}
private boolean addPermission(List<String> permissionsList, String permission) {
Boolean cond;
if (Build.VERSION.SDK_INT >= 23) {
// Marshmallow+
if (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED) {
permissionsList.add(permission);
// Check for Rationale Option
if (!shouldShowRequestPermissionRationale(permission))
// return false;
cond = false;
}
// return true;
cond = true;
} else {
// Pre-Marshmallow
cond = true;
}
return cond;
}
private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
new AlertDialog.Builder(SplashActivity.this)
.setMessage(message)
.setPositiveButton("OK", okListener)
.setNegativeButton("Cancel", null)
.create()
.show();
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
//Checking the request code of our request
if (requestCode == 23) {
//If permission is granted
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Displaying a toast
Toast.makeText(this, "Permission granted", Toast.LENGTH_LONG).show();
} else {
//Displaying another toast if permission is not granted
Toast.makeText(this, "Permission Needed To Run The App", Toast.LENGTH_LONG).show();
}
}
if (requestCode == REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS) {
Map<String, Integer> perms = new HashMap<String, Integer>();
// Initial
perms.put(Manifest.permission.READ_EXTERNAL_STORAGE, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.ACCESS_COARSE_LOCATION, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.ACCESS_FINE_LOCATION, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.READ_SMS, PackageManager.PERMISSION_GRANTED);
//Toast.makeText(SplashScreen.this, " Permissions are jddddd", Toast.LENGTH_SHORT).show();
// Fill with results
for (int i = 0; i < permissions.length; i++)
perms.put(permissions[i], grantResults[i]);
// Check for ACCESS_FINE_LOCATION
if (perms.get(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
&& perms.get(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED &&
perms.get(Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED &&
perms.get(Manifest.permission.READ_SMS) == PackageManager.PERMISSION_GRANTED) {
// All Permissions Granted
// insertDummyContact();
//Toast.makeText(SplashScreen.this, " Permissions are l", Toast.LENGTH_SHORT).show();
LaunchApp();
} else {
// Permission Denied
Toast.makeText(SplashActivity.this, "Some Permission is Denied", Toast.LENGTH_SHORT)
.show();
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
//Do something after 100
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", getPackageName(), null);
intent.setData(uri);
startActivityForResult(intent, REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS);
finish();
}
}, 3000);
}
}
}
public void LaunchApp()
{
Thread background = new Thread() {
public void run() {
try {
// Thread will sleep for 10 seconds
sleep(4*1000);
startActivity(new Intent(getApplicationContext(),LoginActivity.class));
finish();
} catch (Exception e) {
}
}
};
// start thread
background.start();
}
}
答案 0 :(得分：1)
您需要在permissioncheck()之后通过onCreate()方法调用setContentView()。使用您的onCreate()方法替换下面提供的代码。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splashfile);
permissioncheck();
}
我删除了Handler方法上的onCreate()代码。而是使用onRequestPermissionResult()并从中启动LoginActivity。将以下代码替换为您的onRequestPermissionResult()。
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
//Checking the request code of our request
if (requestCode == 23) {
//If permission is granted
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Displaying a toast
Toast.makeText(this, "Permission granted", Toast.LENGTH_LONG).show();
} else {
//Displaying another toast if permission is not granted
Toast.makeText(this, "Permission Needed To Run The App", Toast.LENGTH_LONG).show();
}
}
if (requestCode == REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS) {
Map<String, Integer> perms = new HashMap<String, Integer>();
// Initial
perms.put(Manifest.permission.READ_EXTERNAL_STORAGE, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.ACCESS_COARSE_LOCATION, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.ACCESS_FINE_LOCATION, PackageManager.PERMISSION_GRANTED);
perms.put(Manifest.permission.READ_SMS, PackageManager.PERMISSION_GRANTED);
//Toast.makeText(SplashScreen.this, " Permissions are jddddd", Toast.LENGTH_SHORT).show();
// Fill with results
for (int i = 0; i < permissions.length; i++)
perms.put(permissions[i], grantResults[i]);
// Check for ACCESS_FINE_LOCATION
if (perms.get(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
&& perms.get(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED &&
perms.get(Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED &&
perms.get(Manifest.permission.READ_SMS) == PackageManager.PERMISSION_GRANTED) {
// All Permissions Granted
// Here start the activity
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
Intent i = new Intent(SplashActivity.this, LoginActivity.class);
startActivity(i);
finish();
}
}, 3000);
} else {
// Permission Denied
Toast.makeText(SplashActivity.this, "Some Permission is Denied", Toast.LENGTH_SHORT)
.show();
finish();
}
}
}
请仔细阅读上面提供的代码中的注释。
答案 1 :(得分：1)
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
public class Firstclass extends AppCompatActivity {
private int timeoutMillis = 5000;
/** The time when this {@link AppCompatActivity} was created. */
private long startTimeMillis = 0;
/** The code used when requesting permissions */
private static final int PERMISSIONS_REQUEST = 1234;
public int getTimeoutMillis() {
return timeoutMillis;
}
@SuppressWarnings("rawtypes")
public Class getNextActivityClass() {
return SecondActivity.class;
};
public String[] getRequiredPermissions() {
String[] permissions = null;
try {
permissions = getPackageManager().getPackageInfo(getPackageName(),
PackageManager.GET_PERMISSIONS).requestedPermissions;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
if (permissions == null) {
return new String[0];
} else {
return permissions.clone();
}
}
@TargetApi(23)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startTimeMillis = System.currentTimeMillis();
if (Build.VERSION.SDK_INT >= 23) {
checkPermissions();
} else {
startNextActivity();
}
}
@TargetApi(23)
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
if (requestCode == PERMISSIONS_REQUEST) {
checkPermissions();
}
}
private void startNextActivity() {
runOnUiThread(new Runnable() {
@Override
public void run() {
}
});
long delayMillis = getTimeoutMillis() - (System.currentTimeMillis() - startTimeMillis);
if (delayMillis < 0) {
delayMillis = 0;
}
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
startActivity(new Intent(Firstclass.this, getNextActivityClass()));
finish();
}
}, delayMillis);
}
private void checkPermissions() {
String[] ungrantedPermissions = requiredPermissionsStillNeeded();
if (ungrantedPermissions.length == 0) {
startNextActivity();
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(ungrantedPermissions, PERMISSIONS_REQUEST);
}
}
}
@TargetApi(23)
private String[] requiredPermissionsStillNeeded() {
Set<String> permissions = new HashSet<String>();
for (String permission : getRequiredPermissions()) {
permissions.add(permission);
}
for (Iterator<String> i = permissions.iterator(); i.hasNext();) {
String permission = i.next();
if (checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED) {
Log.d(Firstclass.class.getSimpleName(),
"Permission: " + permission + " already granted.");
i.remove();
} else {
Log.d(Firstclass.class.getSimpleName(),
"Permission: " + permission + " not yet granted.");
}
}
return permissions.toArray(new String[permissions.size()]);
}
}
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />