Create RadioButton RadioGroup dynamically - Android sample
public class MainActivity extends Activity implements OnClickListener {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
RadioGroup radioGroup = new RadioGroup(this);
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
layout.addView(radioGroup, p);
RadioButton radioButtonView = new RadioButton(this);
radioButtonView.setText("RadioButton");
radioButtonView.setOnClickListener(this);
radioGroup.addView(radioButtonView, p);
RadioButton radioButtonView2 = new RadioButton(this);
radioButtonView2.setText("RadioButton2");
radioButtonView2.setOnClickListener(mThisButtonListener);
radioGroup.addView(radioButtonView2, p);
}
public void onClick(View view) {
try {
String s = ((RadioButton) view).getText().toString();
Toast.makeText(MainActivity.this, "This is: " + s,
Toast.LENGTH_LONG).show();
}
catch (Exception e1) {
e1.printStackTrace();
}
}
private OnClickListener mThisButtonListener = new OnClickListener() {
public void onClick(View v) {
String s = ((RadioButton) v).getText().toString();
Toast.makeText(MainActivity.this, "Hello from 2!" + s,
Toast.LENGTH_LONG).show();
}
};
}
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Set in AndroidManifest.xml android:theme="@android:style/Theme.NoTitleBar" AndroidManifest.xml example source code.
AndroidManifest.xml
AndroidManifest.xml
<manifest xmlns:android="//schemas.android.com/apk/res/android"
package="com.myexample.without_titlebar">
<application android:label="My app">
<activity android:name="NoTitleBar"
android:theme="@android:style/Theme.NoTitleBar"
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Black and white bitmap image pictures, gray scale colormatrix Android example.
public class ApokusActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
// CONSTRUCTOR
public SampleView(Context context) {
super(context);
setFocusable(true);
}
@Override
protected void onDraw(Canvas canvas) {
Paint paint = new Paint();
canvas.drawColor(Color.YELLOW);
// you need to insert a image flower_blue into res/drawable folder
paint.setFilterBitmap(true);
Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),
R.drawable.flower_blue);
canvas.drawBitmap(bitmapOrg, 10, 10, paint);
int width, height;
ColorMatrix cm = new ColorMatrix(
new float[]{
0.5f,0.5f,0.5f,0,0,
0.5f,0.5f,0.5f,0,0,
0.5f,0.5f,0.5f,0,0,
0,0,0,1,0,0,
0,0,0,0,1,0
});
cm.setSaturation(0);
ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
paint.setColorFilter(f);
int h = bitmapOrg.getHeight();
//canvas.drawBitmap(bitmapOrg, 10, 10, paint);
canvas.drawBitmap(bitmapOrg, 10, 10 + h + 10, paint);
}
}
}
This version of the rendering library is more recent than your version of ADT plug-in. Please update ADT plug-in
Click on menu Help > Install New Software.
In the Work with field, Add: https://dl-ssl.google.com/android/eclipse/
Select: Developer Tools / Android Development Tools.
Click Next to complete the wizard.
If you have problem try download all sdk + eclipse in one pack , rename old folder for example Andorid_old, create new folder Android and unpack sdk + eclipse from this adress:
//developer.android.com/sdk/index.html
Click on menu Help > Install New Software.
In the Work with field, Add: https://dl-ssl.google.com/android/eclipse/
Select: Developer Tools / Android Development Tools.
Click Next to complete the wizard.
If you have problem try download all sdk + eclipse in one pack , rename old folder for example Andorid_old, create new folder Android and unpack sdk + eclipse from this adress:
//developer.android.com/sdk/index.html
Problem in Android application:
Solution: check code for set and get selection
E/AndroidRuntime(416): FATAL EXCEPTION: main
E/AndroidRuntime(416): java.lang.IndexOutOfBoundsException
E/AndroidRuntime(416): at java.util.Arrays$ArrayList.get(Arrays.java:75)
E/AndroidRuntime(416): at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:298)
E/AndroidRuntime(416): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:351)
E/AndroidRuntime(416): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
E/AndroidRuntime(416): at android.widget.Spinner.makeAndAddView(Spinner.java:192)
E/AndroidRuntime(416): at android.widget.Spinner.layout(Spinner.java:151)
E/AndroidRuntime(416): at android.widget.Spinner.onLayout(Spinner.java:115)
Solution: check code for set and get selection
// Spinner _spin1 contain only 49 items
// you can set max 48 ( range 0 - 48)
// 50 is IndexOutOfBoundsException
_spin1.setSelection(50);
Drawable dr = getResources().getDrawable(R.drawable.algebra);
int h = dr.getIntrinsicHeight();
int w = dr.getIntrinsicWidth();
Bitmap ball = BitmapFactory.decodeResource(getResources(), R.drawable.algebra);
int _nWidth = ball.getWidth();
int _nHeight = ball.getHeight();
Editace: 2011-10-22 08:30:24
Počet článků v kategorii: 396
Url:create-radiobutton-radiogroup-dynamically-android-sample
