Android UI组件学习：Toast

Toast可以提供非常简单的提示信息。

特点：

• 不能获得焦点

2. 显示一段时间后自动消失

Toast类似于对话框，但功能仅限于文本提示或自定义的简单View。

public class MainActivity extends Activity {

    private Button button1,button2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button1 = (Button)findViewById(R.id.button1);
        button2 = (Button)findViewById(R.id.button2);
        button1.setOnClickListener(new Listener());
        button2.setOnClickListener(new Listener());
    }
    class Listener implements OnClickListener{

    @Override
    public void onClick(View v) {
                if(v==button1){
                   Toast toast = Toast.makeText(MainActivity.this, "Toast提示消息",Toast.LENGTH_LONG);
                   toast.show();
            }
            
                if(v==button2){
                //自定义View
                Toast toast = new Toast(MainActivity.this);
                ImageView image = new ImageView(MainActivity.this);
                image.setImageResource(R.drawable.ic_launcher);
                TextView text = new TextView(MainActivity.this);
                text.setText("Toast小提示");
                text.setTextSize(30);
                LinearLayout ll = new LinearLayout(MainActivity.this);
                ll.setOrientation(0);
                ll.addView(image);
                ll.addView(text);
                //toast显示自定义View
                toast.setView(ll);
                //toast显示时间
                toast.setDuration(Toast.LENGTH_SHORT);
                toast.show();
            }
        }
        
    }

[2014-04]