Service Manager $ adb shell service list shell@g3:/ $ service list Found 132 services: 0 AtCmdFwd: [com.qualcomm.atfwd.IAtCmdFwd] 1 lge.apdu: [com.lge.smartcard.internal.apdu.uicc.IUiccAccess] 2 telecom: [com.android.internal.telecom.ITelecomService] 3 phone: [com.android.internal.telephony.ITelephony]
Spinner spinner = findViewById(R.id.currency_spinner); // Create an ArrayAdapter using the String array and a spinner layout ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.spinner_values, R.layout.spinner_item); // Specify the layout to use when the list of choices appears adapter.setDropDownViewResource(R.layout.spinner_dropdown_item); // Apply the adapter to the spinner spinner.setAdapter(adapter); spinner.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position,…
public class MainActivity extends AppCompatActivity { private Button mAddButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mAddButton = findViewById(R.id.addButton); mAddButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { openAddActivity(); } }); } public void openAddActivity(){ Intent intent = new Intent(this, Main2Activity.class); startActivity(intent); }
disable orientation change <activity android:name=”.MainActivity” android:screenOrientation=”portrait” tools:ignore=”LockedOrientationActivity”> Handling orientation state Saving instance state @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putInt(“ScoreKey”, mScore); outState.putInt(“IndexKey”, mIndex); } Retrieving instance state @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (savedInstanceState != null){ mScore = savedInstanceState.getInt(“ScoreKey”); mIndex = savedInstanceState.getInt(“IndexKey”); } else { mScore = 0; mIndex = 0;…
Code class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) Log.d(“LifecycleTest”, “onCreate”) } override fun onStart() { super.onStart() Log.d(“LifecycleTest”, “onStart”) } override fun onResume() { super.onResume() Log.d(“LifecycleTest”, “onResume”) } override fun onPause() { super.onPause() Log.d(“LifecycleTest”, “onPause”) } override fun onSaveInstanceState(outState: Bundle) { super.onSaveInstanceState(outState) Log.d(“LifecycleTest”, “onSaveInstanceState”) } override fun onRestoreInstanceState(savedInstanceState: Bundle) { Log.d(“LifecycleTest”,…
goto Settings > General > About phone > Software information and tap “Build number” seven times until it says “You are now a developer” Goto Settings > General > Developer options and enable USB Debugging Drop down the notifications menu and click on “Tap for more USB options”. Most likely, the main title will say…
Features and Bugs After showing the app around, I got a lot of input how to improve the concep
Waveform of Audio File Installing I’ve tried a component FDWaveformView. It uses CocoaPods, a dependecy management tool like Python’s pip or Rust’s cargo. sudo gem install cocoapods
Toast Toasts are simple message dialogs val text = “Hello toast!” val duration = Toast.LENGTH_SHORT val toast = Toast.makeText(applicationContext, text, duration) toast.show() Toast.makeText(this@MainActivity, “Hello Toast!”, Toast.LENGTH_SHORT).show()
Features and Permissions A permission is something an app is allowed to do 🙂 E.g. using the camera, reading location or accessing your contacts. <uses-permission android:name=”android.permission.CAMERA” /> <uses-feature android:name=”android.hardware.camera” android:required=”true” /> Internet Access If your app uses e.g. web-APIs you need internet access. This can be achieved by adding android.permission.INTERNET to your manifest. In this…