Develop Reference

Soft keyboard on physical device doesn't show when a textbox is clicked

I'm currently using Oppo F7 to test my app that I made using Android Studio. However, when I tested it and I clicked on a textbox (or EditText), the keyboard doesn't show/pop-up. Helpppp..
Note:
- My Oppo F7 is running on Android 8.1.0 (API 27)
- It works on the emulator on my laptop but it's far to laggy for me to test

use like this
public static void showSoftKeyboard(final Context context, final EditText editText) {
try {
editText.requestFocus();
editText.postDelayed(
new Runnable() {
#Override
public void run() {
InputMethodManager keyboard = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
keyboard.showSoftInput(editText, 0);
}
}
, 200);
} catch (NullPointerException npe) {
npe.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
in your activity call on text click
showSoftKeyboard(this, yourEditTextToFocus);

How do I programmatically dismiss a crash dialog?

I'm building a DPC (Device Policy Controller), and one of the issues I'm seeing is that while the Play Store and Play Services are being updated, the Google Contact Sync service crashes -- leaving the typical crash dialog on the screen. Since part of the idea of the initial set up process is to have as little user interaction as possible, how can I dismiss this dialog programmatically (since I seem to be pretty much guaranteed that this will happen)?
I've tried dismissing system dialogs...
ctx.sendBroadcast(new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
... but that doesn't seem to do the trick.
Since this is a DPC, anything that requires device ownership/administration is fine.
edit: Usually I have no UI on screen at the time, so if one is necessary please do mention it. Also, preferably the solution should work on at least 6.0+, if not 4.0+.

Try to do it onWindowsFocusChanged method like this for example :
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (!hasFocus) {
Intent ctx= new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
sendBroadcast(ctx);
}
}
I'm not sure about app crash Dialog but maybe it'll help you

AppErrorDialog can be dismissed by broadcasting ACTION_CLOSE_SYSTEM_DIALOGS if Android version is N.
ctx.sendBroadcast(new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
However, AppErrorDialog won't be displayed if phone is locked.
public boolean canShowErrorDialogs() {
return mShowDialogs && !mSleeping && !mShuttingDown
&& mLockScreenShown != LOCK_SCREEN_SHOWN;
} // ActivityManagerService

Please try this code.
try {
Class ActivityManagerNative = Class.forName("android.app.ActivityManagerNative");
Class IActivityManager = Class.forName("android.app.IActivityManager");
Method getDefault = ActivityManagerNative.getMethod("getDefault", null);
Object am = IActivityManager.cast(getDefault.invoke(ActivityManagerNative, null));
Method closeSystemDialogs = am.getClass().getMethod("closeSystemDialogs", String.class);
closeSystemDialogs.invoke(am, "DPC close");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}

Android NumberPicker with Formatter doesn't format on first rendering

I have a NumberPicker that has a formatter that formats the displayed numbers either when the NumberPicker spins or when a value is entered manually. This works fine, but when the NumberPicker is first shown and I initialize it with setValue(0) the 0 does not get formatted (it should display as "-" instead of 0). As soon as I spin the NumberPicker from that point on everything works.
How can I force the NumberPicker to format always - Both on first rendering and also when I enter a number manually with the keyboard?
This is my formatter
public class PickerFormatter implements Formatter {
private String mSingle;
private String mMultiple;
public PickerFormatter(String single, String multiple) {
mSingle = single;
mMultiple = multiple;
}
#Override
public String format(int num) {
if (num == 0) {
return "-";
}
if (num == 1) {
return num + " " + mSingle;
}
return num + " " + mMultiple;
}
}
I add my formatter to the picker with setFormatter(), this is all I do to the picker.
picker.setMaxValue(max);
picker.setMinValue(min);
picker.setFormatter(new PickerFormatter(single, multiple));
picker.setWrapSelectorWheel(wrap);

dgel's solution doesn't work for me: when I tap on the picker, formatting disappears again. This bug is caused by input filter set on EditText inside NumberPicker when setDisplayValues isn't used. So I came up with this workaround:
Field f = NumberPicker.class.getDeclaredField("mInputText");
f.setAccessible(true);
EditText inputText = (EditText)f.get(mPicker);
inputText.setFilters(new InputFilter[0]);

I also encountered this annoying little bug. Used a technique from this answer to come up with a nasty but effective fix.
NumberPicker picker = (NumberPicker)view.findViewById(id.picker);
picker.setMinValue(1);
picker.setMaxValue(5);
picker.setWrapSelectorWheel(false);
picker.setFormatter(new NumberPicker.Formatter() {
#Override
public String format(int value) {
return my_formatter(value);
}
});
try {
Method method = picker.getClass().getDeclaredMethod("changeValueByOne", boolean.class);
method.setAccessible(true);
method.invoke(picker, true);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
Calling that private changeValueByOne method immediately after instantiating my number picker seems to kick the formatter enough to behave how it should. The number picker comes up nice and clean with the first value formatted correctly. Like I said, nasty but effective.

I had the same problem and I used the setDisplayedValues() method instead.
int max = 99;
String[] values = new String[99];
values[0] = “-” + mSingle
values[1] =
for(int i=2; i<=max; i++){
makeNames[i] = String.valueOf(i) + mMultiple;
}
picker.setMinValue(0);
picker.setMaxValue(max);
picker.setDisplayedValues(values)
This doesn't allow the user to set the value manually in the picker though.

The following solution worked out for me for APIs 18-26 without using reflection, and without using setDisplayedValues().
It consists of two steps:
Make sure the first element shows by setting it's visibility to invisible (I used Layout Inspector to see the difference with when it shows, it's not logical but View.INVISIBLE actually makes the view visible).
private void initNumberPicker() {
// Inflate or create your BugFixNumberPicker class
// Do your initialization on bugFixNumberPicker...
bugFixNumberPicker.setFormatter(new NumberPicker.Formatter() {
#Override
public String format(final int value) {
// Format to your needs
return aFormatMethod(value);
}
});
// Fix for bug in Android Picker where the first element is not shown
View firstItem = bugFixNumberPicker.getChildAt(0);
if (firstItem != null) {
firstItem.setVisibility(View.INVISIBLE);
}
}
Subclass NumberPicker and make sure no click events go through so the glitch where picker elements disapear on touch can't happen.
public class BugFixNumberPicker extends NumberPicker {
public BugFixNumberPicker(Context context) {
super(context);
}
public BugFixNumberPicker(Context context, AttributeSet attrs) {
super(context, attrs);
}
public BugFixNumberPicker(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public boolean performClick() {
return false;
}
#Override
public boolean performLongClick() {
return false;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent event) {
return false;
}
}

Here's my solution based on answers by torvin and Sebastian. You don't have to subclass anything or use reflection.
View editView = numberPicker.getChildAt(0);
if (editView instanceof EditText) {
// Remove default input filter
((EditText) editView).setFilters(new InputFilter[0]);
}

Calling the private method changeValueByOne() via reflection as described in an earlier answer works for me on API Level 16 (Android 4.1.2 and up), but it does not seem to help on API Level 15 (Android 4.0.3), however!
What works for me on API Level 15 (and up) is to use your own custom formatter to create String array and pass that with the method setDisplayedValues() to the number picker.
See also: Android 3.x and 4.x NumberPicker Example

The answer provided by NoActivity worked for me but I only had to do:
View firstItem = bugFixNumberPicker.getChildAt(0);
if (firstItem != null) {
firstItem.setVisibility(View.INVISIBLE);
}
to fix the issue. I did not need to subclass NumberPicker. I did not see the issue where picker elements disappear on touch.

Kotlin version based on Nikolai's answer
private fun initNumberPicker() {
nrPicker.children.iterator().forEach {
if (it is EditText) it.filters = arrayOfNulls(0) // remove default input filter
}
}

I managed to fix it by calling
picker.invalidate();
just after setting the formatter.

Improved Nikolai answer if selected index is not 0. Not to great for performances but fix the problem..
for(index in numberPicker.minValue..numberPicker.maxValue) {
val editView = numberPicker.getChildAt(index-numberPicker.minValue)
if (editView != null && editView is EditText) {
// Remove default input filter
(editView as EditText).filters = arrayOfNulls(0)
}
}

Is there a way to disable ActionBar's show/hide animation?

I've seen this question:
Changing the ActionBar hide animation?
But it doesn't say whether it's possible to disable animation altogether.

You can now do this,
getSupportActionBar().setShowHideAnimationEnabled(false);

I fixed using the below method:
public static void disableShowHideAnimation(ActionBar actionBar) {
try
{
actionBar.getClass().getDeclaredMethod("setShowHideAnimationEnabled", boolean.class).invoke(actionBar, false);
}
catch (Exception exception)
{
try {
Field mActionBarField = actionBar.getClass().getSuperclass().getDeclaredField("mActionBar");
mActionBarField.setAccessible(true);
Object icsActionBar = mActionBarField.get(actionBar);
Field mShowHideAnimationEnabledField = icsActionBar.getClass().getDeclaredField("mShowHideAnimationEnabled");
mShowHideAnimationEnabledField.setAccessible(true);
mShowHideAnimationEnabledField.set(icsActionBar,false);
Field mCurrentShowAnimField = icsActionBar.getClass().getDeclaredField("mCurrentShowAnim");
mCurrentShowAnimField.setAccessible(true);
mCurrentShowAnimField.set(icsActionBar,null);
}catch (Exception e){
//....
}
}
}

If you use ActionBarSherlock then you can do it. See ActionBarImpl class, it has setShowHideAnimationEnabled(boolean enabled) method.

Translate English Text to Hindi in Android

I want to convert a text in English to Hindi and display it in the TextView.I followed the following URL http://android-er.blogspot.com/2009/10/androidtranslate-using-google-translate.html but it dosen't seems to work.
Is there any other method to do it?Help me out.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.read_view);
mTts = new TextToSpeech(this,this);
try {
setTranslate();
} catch (Exception e) {
e.printStackTrace();
}
}
private void setTranslate() throws Exception {
String OutputString = Translate.execute("hello",
Language.ENGLISH, Language.HINDI);
TextView tv = (TextView) findViewById(R.id.translate);
tv.setText(OutputString);
}
Here I am trying to display hindi text in the TextView id "translate"

make sure your application does have internet permission
android.permission.INTERNET
add google translate api jar i.e google.api.translate-java-0.90.jar
Also check this client api it comes useful some times when u want to handle certain events and requests with ease

Microsoft Bing Translator offers a translator for this english-hindi and its completely free for a limited searches.
http://www.microsoft.com/web/post/using-the-free-bing-translation-apis.