Click Handler
Click Handler Android Java example source code. Open new class as activity and open URL in browser.
In layout.xml file:
In string.xml
In MainClass.java file
In layout.xml file:
android:layout_height="wrap_content" android:onClick="@string/clickHandler">
In string.xml
myClickHandler
In MainClass.java file
public void myClickHandler(View view) {
switch (view.getId()) {
// open new class as activity
case R.id.btnOpenClass: {
Intent pictureActivity = new Intent(getBaseContext(),
MyClass.class);
startActivity(pictureActivity);
}
break;
case R.id.btnAbout: {
//aboutDialogCreate();
}
break;
// open url
case R.id.btnHome: {
String url = "//android.okhelp.cz/";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}break;
}
}// end myClickHandler
// listener .. if click on button will scrolling to mTextView bottom
private OnClickListener mButtonListener = new OnClickListener() {
public void onClick(View v) {
// do something when the button is clicked
int nBottom = mTextView.getBottom();
hScrollView.scrollTo(0, nBottom);
}
};
396LW NO topic_id
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Další témata ....(Topics)
Spinner in Android application is equivalent of ComboBox in WinApi.
Spinner get selected item to string example.
Spinner get selected item position to int example.
Main activity class MainComboBox.java
File MyOnItemSelectedListener.java
strings.xml
main.xml
Spinner get selected item to string example.
Spinner get selected item position to int example.
Main activity class MainComboBox.java
public class MainComboBox extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.countries_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new MyOnItemSelectedListener());
Button myButton =(Button)findViewById(R.id.button1);
myButton.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
Spinner sp = (Spinner)findViewById(R.id.spinner);
String spinnerString = null;
spinnerString = sp.getSelectedItem().toString();
int nPos = sp.getSelectedItemPosition();
Toast.makeText(getApplicationContext(), "getSelectedItem=" + spinnerString,
Toast.LENGTH_LONG).show();
Toast.makeText(getApplicationContext(), "getSelectedItemPosition=" + nPos,
Toast.LENGTH_LONG).show();
}
});
}
}
File MyOnItemSelectedListener.java
public class MyOnItemSelectedListener implements OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
Toast.makeText(parent.getContext(), "Item is " +
parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
}
public void onNothingSelected(AdapterView parent) {
// Do nothing.
}
}
strings.xml
<resources>
<string name="hello">Hello World, MainComboBox!</string>
<string name="app_name">ComboBox</string>
<string name="prompt">Choose a country</string>
<string-array name="countries_array">
<item>China</item>
<item>India</item>
<item>USA</item>
<item>Indonesia</item>
<item>Brazil</item>
<item>Pakistan</item>
<item>Nigeria</item>
<item>Bangladesh</item>
<item>Russia</item>
</string-array>
</resources>
main.xml
<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
android:orientation="vertical"
android:padding="10dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:text="@string/prompt"
/>
<Spinner
android:id="@+id/spinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:prompt="@string/prompt"
/>
<Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
</LinearLayout>
If you try function for checking internet connection you can disable internet on the emulator:
Settings - Wireless and networks - Mobile networks - Data enabled (checked - unchecked )
Settings - Wireless and networks - Mobile networks - Data enabled (checked - unchecked )
public boolean isNetworkAvailable() {
ConnectivityManager cm = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = cm.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected()) {
return true;
}
return false;
}