Start Activity from ListView item click Android example
How start certain Activity if user clicked to ListView item
Start Activity from list – launches other activities from list - latest variant!!!!
Game class Game.java game.xml
You have to add class Game to AndroidManifest.xml
Start Activity from list – launches other activities from list - latest variant!!!!
public class Main extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
setContentView(R.layout.main);
ListView mlistView = (ListView) findViewById(R.id.idListView);
mlistView.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,
new String[] {"Game", "Help", "Home site"}));
mlistView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text Game, Help, Home
Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
Toast.LENGTH_SHORT).show();
String sText = ((TextView) view).getText().toString();
Intent intent = null;
if(sText.equals("Game"))
intent = new Intent(getBaseContext(),
Game.class);
//else if(sText.equals("Help")) ..........
if(intent != null)
startActivity(intent);
}
});
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Game class Game.java game.xml
You have to add class Game to AndroidManifest.xml
<activity android:name=".Game" android:label="GameLabel">
</activity>
package cz.okhelp.listview;
import android.app.Activity;
import android.os.Bundle;
public class Game extends Activity{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// you have to create game.xml
setContentView(R.layout.game);
}
}
397LW NO topic_id
Další témata ....(Topics)
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.
If you have trouble with compilation of new project after you make a update of android development tools you can go back to old version of the tools.
-
- Open Help > About Eclipse... use the menu > About...
- Click the "Installation Details" button.
- Select the "Installation History" tab.
- Select one of the previous configurations.
- Click the "Revert" button at the bottom.
Basic shortcuts for Android Emulator.
More about Android Emulator
| Emulated Device Key | Keyboard Key |
|---|---|
| Home | HOME |
| Menu (left softkey) | F2 or Page-up button |
| Star (right softkey) | Shift-F2 or Page Down |
| Back | ESC |
| Call/dial button | F3 |
| Hangup/end call button | F4 |
| Search | F5 |
| Power button | F7 |
| Audio volume up button | KEYPAD_PLUS, Ctrl-5 |
| Audio volume down button | KEYPAD_MINUS, Ctrl-F6 |
| Camera button | Ctrl-KEYPAD_5, Ctrl-F3 |
| Switch to previous layout orientation (for example, portrait, landscape) | KEYPAD_7, Ctrl-F11 |
| Switch to next layout orientation (for example, portrait, landscape) | KEYPAD_9, Ctrl-F12 |
| Toggle cell networking on/off | F8 |
| Toggle code profiling | F9 (only with -trace startup option) |
| Toggle fullscreen mode | Alt-Enter |
| Toggle trackball mode | F6 |
| Enter trackball mode temporarily (while key is pressed) | Delete |
| DPad left/up/right/down | KEYPAD_4/8/6/2 |
| DPad center click | KEYPAD_5 |
| Onion alpha increase/decrease | KEYPAD_MULTIPLY(*) / KEYPAD_DIVIDE(/) |
More about Android Emulator
Add and shuffle elements in LinkedList or ArrayList Java basic example.
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
public class MainClass {
public static void main(String[] arg) {
String[] arrayOfString = {"nothing", "Hello", "people"
, "bye-bye", "hello", "world!", "End" };
List<String> arrayList = new LinkedList<String>();
for(String s: arrayOfString)
arrayList.add(s);
Collections.shuffle(arrayList);
System.out.println(arrayList);
}
}
/*
[hello, world!, bye-bye, nothing, people, End, Hello]
*/
getContext() getApplicationContext() method Java Android example source
Context myContext_1 = ThisClassName.this; // to open a Dialog
Context myContext_2 = getContext();
Context myContext_3 = this.getContext();
Context myContext_4 = this;
Context myContext_5 = this.getApplicationContext ();
OnClickListener getImageBtnOnClick = new OnClickListener() {
public void onClick(View view) {
Context context = view.getContext();
}
};
// Toast
Toast.makeText(getApplicationContext(), "Context == getApplicationContext "
, Toast.LENGTH_SHORT).show();
// store Context in public class
public class MyActivity extends Activity {
public static Context myCnt = null;
...
protected void onCreate(Bundle icicle) {
...
myCnt = this;
MyStorage.setContext(myCnt);
// or
// MyStorage.setContext(this);
// cntxFromStorage == this
Context cntxFromStorage = MyStorage.getContext();
...
};
};
public class MyStorage
{
private static Context cntStorageContext = null;
public static Context getContext() {
return cntStorageContext;
}
public static void setContext(Context context) {
MyStorage.cntStorageContext = context;
}
};
class DataBaseHelper extends SQLiteOpenHelper {
// get MyActivity context
Context cnt = MyStorage.getContext();
}
Editace: 2016-03-02 07:14:49
Počet článků v kategorii: 397
Url:start-activity-from-listview-item-click-android-example
