How set focus on View Android development example
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Set focus on a View in Android application example source code for Button, EditText, View, TextView, isFocused(), requestFocus() .
// set focus on Button Android example
private Button mRightButton;
mRightButton = (Button) a.findViewById(R.id.rightButton);
mRightButton.requestFocus();
// boolean isFocused()
boolean b = mRightButton.isFocused(); // true or false
// set focus on TextView directly Android example
((TextView) findViewById(R.id.myText)).requestFocus();
// set focus on View Android example
private View mView;
mView = findViewById(R.id.showAll);
mView.requestFocus();
// set focus on EditText Android example
private EditText mEdit;
mEdit = (EditText)findViewById(R.id.myEdit);
mEdit.requestFocus();
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public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
String sPackagePath = getPackageResourcePath();
}
If on Android emulator home button pressed.
Diagram of Activity lifecycle if button HOME pressed
// button home presssed
19:37:06.727: INFO/ActivityManager(60): Starting:
Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME]
flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.Launcher } from pid 60
19:37:06.807: INFO/onSaveInstanceState(339): onSaveInstanceState()
19:37:06.848: INFO/onPause(339): onPause()
19:37:07.968: INFO/onStop(339): onStop()
Diagram of Activity lifecycle if button HOME pressed
private void dialogModeFC() {
try {
final AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this)
.setTitle(R.string.select_dialog)
//.setItems(
.setSingleChoiceItems(R.array.select_dialog_items, -1
, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
/* User clicked so do some stuff
<item>Happy New Year</item>
<item>Merry Christmas</item>
<item>I Love You</item>
*/
String[] items = getResources().getStringArray(R.array.select_dialog_items);
// list with boolean variables - which is true
// for (int i = 0; i < _listMode.size(); i++) {
// _listMode.set(i, false);
// }
// _listMode.set(which, true);
dialog.dismiss();
// new AlertDialog.Builder(MainActivity.this)
// .setMessage("You selected: " + which + " , " + items[which])
// .show();
}
})
.create();
alertDialog.show();
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), e.getMessage().toString(), Toast.LENGTH_LONG)
.show();//("dialogModeFC", e.getMessage().toString());
}
}// end dialogModeFC
Full Screen without titlebar and statusbar for Android Activity.
In Activity.java
or in AndroidManifest.xml
In Activity.java
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
}
or in AndroidManifest.xml
<activity android:name=".ActivityName"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
</activity>
Click to Android version combobox - drop down menu and select your version, which just using (have instaled). For example: You updated ADT by SDK manager, but forget to update Android version. You can use lower version from drop down menu, which using your project, or do update of Android by SDK manager.
Editace: 2011-10-09 13:08:13
Počet článků v kategorii: 396
Url:how-set-focus-on-view-android-development-example
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