Android Toast通知用法实例详解

本文实例讲述了Android Toast通知用法。分享给大家供大家参考，具体如下：

Toast在手机屏幕上向用户显示一条信息，一段时间后信息会自动消失。

1.默认用法
代码如下:Toast.makeText(getApplicationContext(), "默认Toast样式",Toast.LENGTH_SHORT).show();

2.Fragment中的用法
代码如下:Toast.makeText(getActivity(),"网络连接错误，请检察网络设置", Toast.LENGTH_LONG).show();

3.自定义显示位置效果

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

4.带图片效果

toast = Toast.makeText(getApplicationContext(), "带图片的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();

5.完全自定义效果

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("完全自定义Toast");
toast = new Toast(getApplicationContext());
toast.setGravity(Gravity.RIGHT | Gravity.TOP, 12, 40);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(layout);
toast.show();

6.其他线程

Main.java代码：

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(), "我来自其他线程！",Toast.LENGTH_SHORT).show();
      }
    });
  }
  @Override
  public void onClick(View v) {
    Toast toast = null;
    switch (v.getId()) {
    case R.id.btnSimpleToast:
      Toast.makeText(getApplicationContext(), "默认Toast样式",Toast.LENGTH_SHORT).show();
      break;
    case R.id.btnSimpleToastWithCustomPosition:
      toast = Toast.makeText(getApplicationContext(), "自定义位置Toast",Toast.LENGTH_LONG);
      toast.setGravity(Gravity.CENTER, 0, 0);
      toast.show();
      break;
    case R.id.btnSimpleToastWithImage:
      toast = Toast.makeText(getApplicationContext(), "带图片的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("完全自定义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;
    }
  }
}

main.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="Http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:gravity="center"
  android:orientation="vertical"
  android:padding="5dip" >
  <Button
    android:id="@+id/btnSimpleToast"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="默认" >
  </Button>
  <Button
    android:id="@+id/btnSimpleToastWithCustomPosition"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="自定义显示位置" >
  </Button>
  <Button
    android:id="@+id/btnSimpleToastWithImage"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="带图片" >
  </Button>
  <Button
    android:id="@+id/btnCustomToast"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="完全自定义" >
  </Button>
  <Button
    android:id="@+id/btnRunToastFromOtherThread"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="其他线程" >
  </Button>
</LinearLayout>

custom.xml：

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

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希望本文所述对大家Android程序设计有所帮助。

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