package com.kevin.dialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Main extends Activity implements OnClickListener{
	private Button btn_select;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn_select = (Button) findViewById(R.id.button1);
        btn_select.setOnClickListener(this);
    }
	@Override
	public void onClick(View v) {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle(R.string.select);
		// 绑定选项数据
		builder.setItems(R.array.fruits, new DialogInterface.OnClickListener() {		
			// 处理选择Item的事件
			@Override
			public void onClick(DialogInterface dialog, int which) {
				CharSequence result = getString(R.string.result);
				String[] fruits = getResources().getStringArray(R.array.fruits);
				new AlertDialog.Builder(Main.this)
				 .setMessage(result + fruits[which])
				 .setNegativeButton(R.string.confirm, new DialogInterface.OnClickListener() {												
							@Override
							public void onClick(DialogInterface dialog, int which) {
													
						    }
					})
				.show();				                             
			}
		});
		builder.show();
	}
}

package com.kevin.toast;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class Main extends Activity implements OnClickListener{
	private EditText et_msg;
	private Button btn_send;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        et_msg = (EditText) findViewById(R.id.et_msg);
        btn_send = (Button) findViewById(R.id.button1);
        btn_send.setOnClickListener(this);
    }
	@Override
	public void onClick(View v) {
		Editable msg = et_msg.getText();
		// 自定义Toast显示效果
		Toast toast = new Toast(this);
		LinearLayout layout = new LinearLayout(this);
		layout.setOrientation(LinearLayout.HORIZONTAL);
		ImageView image = new ImageView(this);
		image.setImageResource(R.drawable.android_waving);
		TextView textView = new TextView(this);
		textView.setText(msg);
		layout.addView(image);
		layout.addView(textView);
		toast.setView(layout);
		toast.setDuration(Toast.LENGTH_LONG);
		toast.show();
	}
}

package com.kevin.checkbox;

import android.app.Activity;
import android.os.Bundle;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;

public class Main extends Activity {
	private CheckBox chk_show;
	private EditText et_password;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        et_password = (EditText) findViewById(R.id.et_password);
        chk_show = (CheckBox) findViewById(R.id.chk_show);
        chk_show.setOnCheckedChangeListener(new CheckChangedListener());
    }
    
    class CheckChangedListener implements OnCheckedChangeListener{

		@Override
		public void onCheckedChanged(CompoundButton buttonView,
				boolean isChecked) {
			if(isChecked){
				// 设置EditText的内容为显示
				et_password.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
			}else{
				// 设置EditText的内容为隐藏
				et_password.setTransformationMethod(PasswordTransformationMethod.getInstance());
			}
		}
    	
    }
}