Toast几种使用方法

1. // 第一个参数：当前的上下文环境。可用getApplicationContext()或this 
2. // 第二个参数：要显示的字符串。也可是R.string中字符串ID 
3. // 第三个参数：显示的时间长短。Toast默认的有两个LENGTH_LONG(长)和LENGTH_SHORT(短)，也可以使用毫秒如2000ms 
4. Toast toast=Toast.makeText(getApplicationContext(), "默认的Toast", Toast.LENGTH_SHORT); 
5. //显示toast信息 
6. toast.show();

1. Toast toast=Toast.makeText(getApplicationContext(), "自定义显示位置的Toast", Toast.LENGTH_SHORT); 
2.         //第一个参数：设置toast在屏幕中显示的位置。我现在的设置是居中靠顶 
3.         //第二个参数：相对于第一个参数设置toast位置的横向X轴的偏移量，正数向右偏移，负数向左偏移 
4.         //第三个参数：同的第二个参数道理一样 
5.         //如果你设置的偏移量超过了屏幕的范围，toast将在屏幕内靠近超出的那个边界显示 
6.         toast.setGravity(Gravity.TOP|Gravity.CENTER, -50, 100);  
7.         //屏幕居中显示，X轴和Y轴偏移量都是0 
8.         //toast.setGravity(Gravity.CENTER, 0, 0);  
9.         toast.show();

1. oast toast=Toast.makeText(getApplicationContext(), "显示带图片的toast", 3000); 
2.         toast.setGravity(Gravity.CENTER, 0, 0);  
3.         //创建图片视图对象 
4.         ImageView imageView= new ImageView(getApplicationContext()); 
5.         //设置图片 
6.         imageView.setImageResource(R.drawable.ic_launcher); 
7.         //获得toast的布局 
8.         LinearLayout toastView = (LinearLayout) toast.getView(); 
9.         //设置此布局为横向的 
10.         toastView.setOrientation(LinearLayout.HORIZONTAL); 
11.         //将ImageView在加入到此布局中的第一个位置 
12.         toastView.addView(imageView, 0); 
13.         toast.show();

public class ToastActivity extends Activity {
    private Button bt;
    private ImageView image;
    private TextView title, content;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        bt = (Button) findViewById(R.id.bt);
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showToast();
            }
        });
    }

    private void showToast() {
        LayoutInflater inflater = getLayoutInflater();
        View view = inflater.inflate(R.layout.toast, null);
        image = (ImageView) view.findViewById(R.id.image);
        title = (TextView) view.findViewById(R.id.title);
        content = (TextView) view.findViewById(R.id.content);
        image.setBackgroundResource(R.drawable.ic_launcher);
        title.setText("自定义toast");
        content.setText("hello,self toast");
        Toast toast = new Toast(getApplicationContext());
        toast.setGravity(Gravity.CENTER, 0, 0);
        toast.setDuration(Toast.LENGTH_SHORT);
        toast.setView(view);
        toast.show();
    }

}

//调用方法1 
    //Thread th=new Thread(this); 
    //th.start(); 
    //调用方法2 
    handler.post(new Runnable() { 
        @Override 
        public void run() { 
            showToast(); 
        } 
    }); 
 
Java代码
public void showToast(){ 
        Toast toast=Toast.makeText(getApplicationContext(), "Toast在其他线程中调用显示", Toast.LENGTH_SHORT); 
        toast.show(); 
    } 
 
Java代码
Handler handler=new Handler(){ 
        @Override 
        public void handleMessage(Message msg) { 
            int what=msg.what; 
            switch (what) { 
            case 1: 
                showToast(); 
                break; 
            default: 
                break; 
            } 
             
            super.handleMessage(msg); 
        } 
    }; 
 
Java代码
@Override 
    public void run() { 
        handler.sendEmptyMessage(1); 
    }