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) {
}
}
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The Labeled continue statement as goto Java example.
public class MainClass {
public static void main(String[] arg) {
String[] arrayOfString = { "Hello", "people", "hello", "world!" };
OuterLoop: for (int e = 0; e < 4; e++) {
for (int i = 0; i < arrayOfString.length; i++) {
if (arrayOfString[i].equals("hello"))
continue OuterLoop;
System.out.println(arrayOfString[i]);
}
}
}
}
/*
Hello
people
Hello
people
Hello
people
Hello
people
*/
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
*/
Select file in project explorer
Menu:
File - Make File Read-only - to lock
File - Make File Writable - to unlock
Menu:
File - Make File Read-only - to lock
File - Make File Writable - to unlock
Warning in AndroidManifest.xml:
tag should specify a target API level (the highest verified version; when running on
later versions, compatibility behaviors may be enabled) with android:targetSdkVersion="?"
Solution:
later versions, compatibility behaviors may be enabled) with android:targetSdkVersion="?"
Solution:
<uses-sdk android:minSdkVersion="4"
android:targetSdkVersion="16" />
// single line
/*
multi line
*/
Editace: 2011-09-28 07:45:52
Počet článků v kategorii: 396
Url:button-android