Android中Toast的用法簡介

轉自：http://www.cnblogs.com/GnagWang/archive/2010/11/26/1888762.html

Toast是Android中用來顯示顯示信息的一種機制，和Dialog不同的是，Toast是沒有焦點的，並且Toast顯示的時間有限，過必定的時間就會自動消失。下面用一個實例來看看如何使用Toast。

 

1.默認效果

代碼

Toast.makeText(getApplicationContext(), "默認Toast樣式",
     Toast.LENGTH_SHORT).show();

 

2.自定義顯示位置效果

代碼

toast = Toast.makeText(getApplicationContext(),
     "自定義位置Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER, 0, 0);
   toast.show();

 

3.帶圖片效果

 

代碼

toast = Toast.makeText(getApplicationContext(),
     "帶圖片的Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER, 0, 0);
   LinearLayout toastView = (LinearLayout) toast.getView();
   ImageView imageCodeProject = new ImageView(getApplicationContext());
   imageCodeProject.setImageResource(R.drawable.icon);
   toastView.addView(imageCodeProject, 0);
   toast.show();

 

4.徹底自定義效果

代碼

LayoutInflater inflater = getLayoutInflater();
   View layout = inflater.inflate(R.layout.custom,
     (ViewGroup) findViewById(R.id.llToast));
   ImageView image = (ImageView) layout
     .findViewById(R.id.tvImageToast);
   image.setImageResource(R.drawable.icon);
   TextView title = (TextView) layout.findViewById(R.id.tvTitleToast);
   title.setText("Attention");
   TextView text = (TextView) layout.findViewById(R.id.tvTextToast);
   text.setText("徹底自定義Toast");
   toast = new Toast(getApplicationContext());
   toast.setGravity(Gravity.RIGHT | Gravity.TOP, 12, 40);
   toast.setDuration(Toast.LENGTH_LONG);
   toast.setView(layout);
   toast.show();

 

5.其餘線程

 代碼

new Thread(new Runnable() {
    public void run() {
     showToast();
    }
   }).start();

 

 

完整代碼

1.Main,java

package com.wjq.toast;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class Main extends Activity implements OnClickListener {
 Handler handler = new Handler();

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  findViewById(R.id.btnSimpleToast).setOnClickListener(this);
  findViewById(R.id.btnSimpleToastWithCustomPosition).setOnClickListener(
    this);
  findViewById(R.id.btnSimpleToastWithImage).setOnClickListener(this);
  findViewById(R.id.btnCustomToast).setOnClickListener(this);
  findViewById(R.id.btnRunToastFromOtherThread).setOnClickListener(this);

 }

 public void showToast() {
  handler.post(new Runnable() {

   @Override
   public void run() {
    Toast.makeText(getApplicationContext(), "我來自其餘線程！",
      Toast.LENGTH_SHORT).show();

   }
  });
 }

 @Override
 public void onClick(View v) {
  Toast toast = null;
  switch (v.getId()) {
  case R.id.btnSimpleToast:
   Toast.makeText(getApplicationContext(), "默認Toast樣式",
     Toast.LENGTH_SHORT).show();
   break;
  case R.id.btnSimpleToastWithCustomPosition:
   toast = Toast.makeText(getApplicationContext(),
     "自定義位置Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER, 0, 0);
   toast.show();
   break;
  case R.id.btnSimpleToastWithImage:
   toast = Toast.makeText(getApplicationContext(),
     "帶圖片的Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER, 0, 0);
   LinearLayout toastView = (LinearLayout) toast.getView();
   ImageView imageCodeProject = new ImageView(getApplicationContext());
   imageCodeProject.setImageResource(R.drawable.icon);
   toastView.addView(imageCodeProject, 0);
   toast.show();
   break;
  case R.id.btnCustomToast:
   LayoutInflater inflater = getLayoutInflater();
   View layout = inflater.inflate(R.layout.custom,
     (ViewGroup) findViewById(R.id.llToast));
   ImageView image = (ImageView) layout
     .findViewById(R.id.tvImageToast);
   image.setImageResource(R.drawable.icon);
   TextView title = (TextView) layout.findViewById(R.id.tvTitleToast);
   title.setText("Attention");
   TextView text = (TextView) layout.findViewById(R.id.tvTextToast);
   text.setText("徹底自定義Toast");
   toast = new Toast(getApplicationContext());
   toast.setGravity(Gravity.RIGHT | Gravity.TOP, 12, 40);
   toast.setDuration(Toast.LENGTH_LONG);
   toast.setView(layout);
   toast.show();
   break;
  case R.id.btnRunToastFromOtherThread:
   new Thread(new Runnable() {
    public void run() {
     showToast();
    }
   }).start();
   break;

  }

 }
}

 

2.main,xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="fill_parent"
 android:layout_height="fill_parent" android:padding="5dip" android:gravity="center">
 <Button android:layout_height="wrap_content"
  android:layout_width="fill_parent" android:id="@+id/btnSimpleToast"
  android:text="默認"></Button>
 <Button android:layout_height="wrap_content"
  android:layout_width="fill_parent" android:text="自定義顯示位置"
  android:id="@+id/btnSimpleToastWithCustomPosition"></Button>
 <Button android:layout_height="wrap_content"
  android:layout_width="fill_parent" android:id="@+id/btnSimpleToastWithImage"
  android:text="帶圖片"></Button>
 <Button android:layout_height="wrap_content"
  android:layout_width="fill_parent" android:text="徹底自定義"
  android:id="@+id/btnCustomToast"></Button>
 <Button android:layout_height="wrap_content"
  android:layout_width="fill_parent" android:text="其餘線程"
  android:id="@+id/btnRunToastFromOtherThread"></Button>

</LinearLayout>

 

3.custom.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:layout_width="wrap_content" android:background="#ffffffff" android:orientation="vertical" android:id="@+id/llToast" > <TextView  android:layout_height="wrap_content"  android:layout_margin="1dip"  android:textColor="#ffffffff"  android:layout_width="fill_parent"  android:gravity="center"  android:background="#bb000000"  android:id="@+id/tvTitleToast" /> <LinearLayout  android:layout_height="wrap_content"  android:orientation="vertical"  android:id="@+id/llToastContent"  android:layout_marginLeft="1dip"  android:layout_marginRight="1dip"  android:layout_marginBottom="1dip"  android:layout_width="wrap_content"  android:padding="15dip"  android:background="#44000000" >  <ImageView   android:layout_height="wrap_content"   android:layout_gravity="center"   android:layout_width="wrap_content"   android:id="@+id/tvImageToast" />  <TextView   android:layout_height="wrap_content"   android:paddingRight="10dip"   android:paddingLeft="10dip"   android:layout_width="wrap_content"   android:gravity="center"   android:textColor="#ff000000"   android:id="@+id/tvTextToast" /> </LinearLayout></LinearLayout>