DebugActivity.java

package com.google.mcommerce.sample.android.chapter04.actionBar;

import android.app.Activity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

import com.google.mcommerce.sample.android.R;

public abstract class DebugActivity extends Activity implements IReportBack {
	// Derived classes needs first
	protected abstract boolean onMenuItemSelected(MenuItem item);

	// private variables set by constructor
	private static String tag = null;
	private int menuId = 0;
	private int layoutid = 0;
	private int debugTextViewId = 0;

	public DebugActivity(int inMenuId, int inLayoutId, int inDebugTextViewId,
			String inTag) {
		tag = inTag;
		menuId = inMenuId;
		layoutid = inLayoutId;
		debugTextViewId = inDebugTextViewId;

	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(this.layoutid);
		TextView tv = this.getTextView();
		tv.setMovementMethod(ScrollingMovementMethod.getInstance());
		// tv.setMovementMethod(
		// new ScrollingMovementMethod());
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		MenuInflater inflater = getMenuInflater();
		inflater.inflate(menuId, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		appendMenuItemText(item);
		if (item.getItemId() == R.id.menu_da_clear) {
			this.emptyText();
			return true;
		}
		boolean b = onMenuItemSelected(item);
		if (b == true) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	protected TextView getTextView() {
		return (TextView) this.findViewById(this.debugTextViewId);
	}

	protected void appendMenuItemText(MenuItem menuItem) {
		String title = menuItem.getTitle().toString();
		appendText("MenuItem:" + title);
	}

	protected void emptyText() {
		TextView tv = getTextView();
		tv.setText("");
	}

	protected void appendText(String s) {
		TextView tv = getTextView();
		tv.setText(s + "\n" + tv.getText());
		Log.d(tag, s);
	}

	public void reportBack(String tag, String message) {
		this.appendText(tag + ":" + message);
		Log.d(tag, message);
	}

	public void reportTransient(String tag, String message) {
		String s = tag + ":" + message;
		Toast mToast = Toast.makeText(this, s, Toast.LENGTH_SHORT);
		mToast.show();
		reportBack(tag, message);
		Log.d(tag, message);
	}
}// eof-class