1.默认展示
// 第一个参数:当前的上下文环境。可用getApplicationContext()或this // 第二个参数:要显示的字符串。也可是R.string中字符串ID // 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 Toast toast=Toast.makeText(getApplicationContext(), "默认的Toast", Toast.LENGTH_SHORT); //显示toast信息 toast.show();
2.自定义显示位置
Toast toast=Toast.makeText(getApplicationContext(), "自定义显示位置的Toast", Toast.LENGTH_SHORT); //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 //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 //第三个参数:同的第二个参数道理一样 //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 toast.setGravity(Gravity.TOP|Gravity.CENTER, -50, 100); //屏幕居中显示,X轴和Y轴偏移量都是0 //toast.setGravity(Gravity.CENTER, 0, 0); toast.show();
3.带图片的
Toast toast=Toast.makeText(getApplicationContext(), "显示带图片的toast", 3000); toast.setGravity(Gravity.CENTER, 0, 0); //创建图片视图对象 ImageView imageView= new ImageView(getApplicationContext()); //设置图片 imageView.setImageResource(R.drawable.ic_launcher); //获得toast的布局 LinearLayout toastView = (LinearLayout) toast.getView(); //设置此布局为横向的 toastView.setOrientation(LinearLayout.HORIZONTAL); //将ImageView在加入到此布局中的第一个位置 toastView.addView(imageView, 0);
4.完全自定义显示方式
1. toast.xml布局
<ImageView android:id="@+id/image" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/content" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
2.activity代码
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(); } }
5.其他线程通过Handler的调用
//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); }