Mega Code Archive
Extends TextView to create customized widget
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package app.test;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
class TodoListItemView extends TextView {
private Paint marginPaint;
private Paint linePaint;
private int paperColor;
private float margin;
public TodoListItemView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
marginPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
marginPaint.setColor(Color.RED);
linePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
linePaint.setColor(Color.BLUE);
paperColor = Color.YELLOW;
margin = Color.CYAN;
}
@Override
public void onDraw(Canvas canvas) {
canvas.drawColor(paperColor);
canvas.drawLine(0, 0, getMeasuredHeight(), 0, linePaint);
canvas.drawLine(0, getMeasuredHeight(), getMeasuredWidth(),
getMeasuredHeight(), linePaint);
canvas.drawLine(margin, 0, margin, getMeasuredHeight(), marginPaint);
canvas.save();
canvas.translate(margin, 0);
super.onDraw(canvas);
canvas.restore();
}
}
public class Test extends Activity {
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
ListView myListView = (ListView) findViewById(R.id.myListView);
final EditText myEditText = (EditText) findViewById(R.id.myEditText);
final ArrayList<String> todoItems = new ArrayList<String>();
int resID = R.layout.row;
final ArrayAdapter<String> aa = new ArrayAdapter<String>(this, resID,
todoItems);
myListView.setAdapter(aa);
myEditText.setOnKeyListener(new OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN)
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
todoItems.add(0, myEditText.getText().toString());
myEditText.setText("");
aa.notifyDataSetChanged();
return true;
}
return false;
}
});
}
}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<EditText
android:id="@+id/myEditText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="New To Do Item"
/>
<ListView
android:id="@+id/myListView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
//row.xml
<?xml version="1.0" encoding="utf-8"?>
<app.test.TodoListItemView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:scrollbars="vertical"
android:fadingEdge="vertical"
/>
]]>