Button Android
Google Android button example source code for developers.
// get handle
Button myButton;
myButton = (Button)findViewById(R.id.idMyButton);
//set focus
myButton.requestFocus();
// set background image
myButton.setBackgroundResource(R.drawable.backImage);
// or
myButton.setBackgroundDrawable(getResources().getDrawable( R.drawable.someImage));
// set visibility
myButton.setVisibility(View.INVISIBLE); // VISIBLE
///////// SET LISTENER
Button myButton =(Button)findViewById(R.id.button1);
myButton.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "AHOJ",
Toast.LENGTH_LONG).show();
}
});
// or set onClickListener
myButton.setOnClickListener(myListener);
//end onCreate .....
private OnClickListener myListener = new OnClickListener() {
public void onClick(View v) {
}
}
397LW NO topic_id
Další témata ....(Topics)
Hashtable find value by key Java Android basic example.
import java.util.Hashtable;
public class MainClass {
public static void main(String[] arg) {
// english;germany dictionary
String[] arrayOfString = { "one;eine", "two;zwei", "three;drei" };
Hashtable hashTable = new Hashtable();
for(String s: arrayOfString){
String[] array = s.split(";");
String sKey ="", sValue="";
if(array.length > 1){
sKey = array[0]; sValue = array[1];
hashTable.put(sKey, sValue);
}
}
// check if key exists
if( hashTable.containsKey("two")){
System.out.print("two = " + hashTable.get("two"));
}
}
}
/*
two = zwei
*/
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
If you want save battery, select "Satelite map" from map menu and reduce the brightness of the display.
Delete - unistal app from testing device - emulator and try again RUN - DEBUGG your app.
If Android emulator freezes at startup, try create new virtual device with smaller memory and cpu usage, or select older version of Android, or buy new pc with higher performance.
- open AVD MANAGER
- press Create Virtual Device
- select Device with small memory usage (e.g. 480x800 of resolution) - Next
- check - Show downloadable ....
- Download - lower version of system Android, select, press - Next
- check data, Show Advanced Settings, check Use host... and press Finish
Editace: 2011-09-28 07:45:52
Počet článků v kategorii: 397
Url:button-android
