Android: Query JSON-Data , log the response to logcat

[java] package de.clarisweb.android.jsondemo; import android.os.AsyncTask; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.View; import android.view.Menu; import android.view.MenuItem; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; public class MainActivity extends AppCompatActivity { public class DownloadTask extends AsyncTask< String, Void, String> { @Override protected String doInBackground(String... urls) { String result = [...]

Android: Timer

[java] @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); new CountDownTimer(10000, 100) { public void onTick(long millisecondsUntilDone) { Log.i("Seconds Left!", String.valueOf(millisecondsUntilDone / 1000)); Toast.makeText(MainActivity.this, "" + String.valueOf(millisecondsUntilDone / 1000), Toast.LENGTH_SHORT).show(); } public void onFinish() { Log.i("We're done!", "No more countdown"); } }.start();</pre> [/java]

Android Listview: clicked item löschen

[java] package de.clarisweb.android.listview; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final ListView myListView = findViewById((R.id.myListView)); final ArrayList myFamily = new ArrayList(); myFamily.add("P1"); myFamily.add("P2"); myFamily.add("P3"); myFamily.add("P4"); myFamily.add("P5"); final ArrayAdapter arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, myFamily); myListView.setAdapter(arrayAdapter); myListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView adapterView, View view, int i, long [...]

Android: run task in background

  [java] package de.clarisweb.android.downloadwebcontent; import android.os.AsyncTask; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; public class MainActivity extends AppCompatActivity { public class DownloadTask extends AsyncTask { @Override protected String doInBackground(String... strings) { Log.i("URL", strings[0]); return "done !"; } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); DownloadTask task = new DownloadTask(); String result=null; try { result = [...]