Settings: Correctly align cursor in Settings

Steps to Reproduce:
- Click on Density Settings (DPI Settings) / Renaming BT Device / Renaming SIM Settings
- EditText Dialog pops up
- The cursor is at the leftmost side of the text
- Logically Cursor should be at rightmost side which can be aligned grabbing text length

Screenshots:
Before:
http://imgur.com/a/o4vkr
http://imgur.com/a/6Qext

After:
http://imgur.com/a/fuxqT
http://imgur.com/a/vm2WX

Bug: 65185652
Test: RunSettingsRoboTests: OK (47 tests)

Change-Id: Id00308e7e019434edad4afab56cf4719be0d0d54
Signed-off-by: PMS22 <prathams99@rediff.com>

src/com/android/settings/Utils.java

@@ -103,6 +103,7 @@ import android.view.ViewGroup;
 import android.view.animation.Animation;
 import android.view.animation.Animation.AnimationListener;
 import android.view.animation.AnimationUtils;
+import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.TabWidget;
 
@@ -1362,4 +1363,7 @@ public final class Utils extends com.android.settingslib.Utils {
                 && volume.isMountedReadable();
     }
 
+    public static void setEditTextCursorPosition(EditText editText) {
+        editText.setSelection(editText.getText().length());
+    }
 }

src/com/android/settings/bluetooth/BluetoothNameDialogFragment.java

@@ -116,6 +116,7 @@ abstract class BluetoothNameDialogFragment extends InstrumentedDialogFragment
             mDeviceNameView.setSelection(deviceName.length());
         }
         mDeviceNameView.addTextChangedListener(this);
+        com.android.settings.Utils.setEditTextCursorPosition(mDeviceNameView);
         mDeviceNameView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
             @Override
             public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {

src/com/android/settings/bluetooth/DeviceProfilesSettings.java

@@ -323,6 +323,7 @@ public final class DeviceProfilesSettings extends InstrumentedDialogFragment imp
         final EditText deviceNameField = (EditText) mRootView.findViewById(R.id.name);
         if (deviceNameField != null) {
             deviceNameField.setText(mCachedDevice.getName());
+            com.android.settings.Utils.setEditTextCursorPosition(deviceNameField);
         }
 
         refreshProfiles();

src/com/android/settings/display/DensityPreference.java

@@ -27,6 +27,7 @@ import android.widget.EditText;
 
 import com.android.settings.R;
 import com.android.settingslib.CustomEditTextPreference;
+import com.android.settings.Utils;
 import com.android.settingslib.display.DisplayDensityUtils;
 
 import java.text.NumberFormat;
@@ -63,6 +64,7 @@ public class DensityPreference extends CustomEditTextPreference {
         if (editText != null) {
             editText.setInputType(InputType.TYPE_CLASS_NUMBER);
             editText.setText(getCurrentSwDp() + "");
+            Utils.setEditTextCursorPosition(editText);
         }
     }
 

src/com/android/settings/sim/SimPreferenceDialog.java

@@ -40,6 +40,7 @@ import android.widget.Spinner;
 import android.widget.TextView;
 
 import com.android.settings.R;
+import com.android.settings.Utils;
 
 public class SimPreferenceDialog extends Activity {
 
@@ -98,13 +99,14 @@ public class SimPreferenceDialog extends Activity {
 
         EditText nameText = (EditText)mDialogLayout.findViewById(R.id.sim_name);
         nameText.setText(savedInstanceState.getString(SIM_NAME));
+        Utils.setEditTextCursorPosition(nameText);
     }
 
     private void createEditDialog(Bundle bundle) {
         final Resources res = mContext.getResources();
         EditText nameText = (EditText)mDialogLayout.findViewById(R.id.sim_name);
         nameText.setText(mSubInfoRecord.getDisplayName());
-
+        Utils.setEditTextCursorPosition(nameText);
         final Spinner tintSpinner = (Spinner) mDialogLayout.findViewById(R.id.spinner);
         SelectColorAdapter adapter = new SelectColorAdapter(mContext,
                 R.layout.settings_color_picker_item, mColorStrings);
@@ -154,7 +156,7 @@ public class SimPreferenceDialog extends Activity {
             @Override
             public void onClick(DialogInterface dialog, int whichButton) {
                 final EditText nameText = (EditText)mDialogLayout.findViewById(R.id.sim_name);
-
+                Utils.setEditTextCursorPosition(nameText);
                 String displayName = nameText.getText().toString();
                 int subId = mSubInfoRecord.getSubscriptionId();
                 mSubInfoRecord.setDisplayName(displayName);

tests/robotests/src/com/android/settings/UtilsTest.java

@@ -25,6 +25,8 @@ import android.os.storage.VolumeInfo;
 import android.text.SpannableStringBuilder;
 import android.text.format.DateUtils;
 import android.text.style.TtsSpan;
+import android.widget.EditText;
+import android.widget.TextView;
 
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 import com.android.settings.wrapper.DevicePolicyManagerWrapper;
@@ -325,4 +327,15 @@ public class UtilsTest {
         assertThat(Utils.isProfileOrDeviceOwner(mUserManager, mDevicePolicyManager,
                 PACKAGE_NAME)).isTrue();
     }
+
+    @Test
+    public void testSetEditTextCursorPosition_shouldGetExpectedEditTextLenght() {
+        final EditText editText = new EditText(mContext);
+        final CharSequence text = "test";
+        editText.setText(text, TextView.BufferType.EDITABLE);
+        final int length = editText.getText().length();
+        Utils.setEditTextCursorPosition(editText);
+
+        assertThat(editText.getSelectionEnd()).isEqualTo(length);
+    }
 }