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import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;import android.app.Activity;import android.app.AlertDialog.Builder;import android.app.Dialog;import android.content.DialogInterface;public class MainActivity extends Activity {    private Button mToastButton;    private Button mAlertDialogButton;    private Dialog mDialog;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);		init();	}    private void init(){    	mToastButton=(Button) findViewById(R.id.toastButton);    	mToastButton.setOnClickListener(new ButtonOnClickListenerImpl());    	mAlertDialogButton=(Button) findViewById(R.id.alertDialogButton);    	mAlertDialogButton.setOnClickListener(new ButtonOnClickListenerImpl());    }	private class ButtonOnClickListenerImpl implements OnClickListener {		@Override		public void onClick(View view) {			switch (view.getId()) {			case R.id.toastButton:                Toast.makeText(MainActivity.this, getResources().getString(R.string.toast_info), Toast.LENGTH_LONG).show();                break;			case R.id.alertDialogButton:                Builder builder=new Builder(MainActivity.this);                builder.setIcon(R.drawable.ic_launcher);                builder.setTitle(getResources().getString(R.string.dialog_title));                builder.setMessage(R.string.dialog_message);                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {					@Override					public void onClick(DialogInterface dialog, int arg1) {						 Toast.makeText(MainActivity.this, getResources().getString(R.string.dialog_no), Toast.LENGTH_SHORT).show();					}				});                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {					@Override					public void onClick(DialogInterface dialog, int arg1) {						 Toast.makeText(MainActivity.this, getResources().getString(R.string.dialog_ok), Toast.LENGTH_SHORT).show();					}				});                                mDialog=builder.create();                mDialog.show();				break;			default:				break;			}		}	}}

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