Toast 是一种非常方便的消息提示框，有两个特点：

1.Toast提示信息不会获取焦点。

2.Toast提示信息过一段时会自动消失。

使用方法比较简单，一般通过以下步骤：

1.调用Toast构造器或makeText()静态方法创建一个Toast对象。

2.调用Toast的方法业设置该消息提示的对齐方式、页边距等。

3.调用Toast的show()方法将它显示出来。

代码：

package shortcut.song.com.myapplication;

import android.content.Context;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

public class ToastActivity extends AppCompatActivity {

Button mButton1;

Button mButton2;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_toast);

mButton1 = (Button) findViewById(R.id.button1);

mButton2 = (Button) findViewById(R.id.button2);

mButton1.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Toast.makeText(ToastActivity.this, "普通提示", Toast.LENGTH_SHORT).show();

}

});

mButton2.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Toast toast = new Toast(ToastActivity.this);

toast.setGravity(Gravity.CENTER, 0, 0);

LinearLayout ll = new LinearLayout(ToastActivity.this);

ImageView imageView = new ImageView(ToastActivity.this);

imageView.setImageResource(R.drawable.alert_dialog_icon);

ll.addView(imageView);

TextView textView = new TextView(ToastActivity.this);

textView.setText("带图片的提示");

ll.addView(textView);

toast.setView(ll);

toast.setDuration(Toast.LENGTH_LONG);

toast.show();

}

});

}

public View addView(int layout)

{

LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View view = inflater.inflate(layout, null);

return view;

}

public void showToast()

{

Toast mToast = new Toast(ToastActivity.this);

mToast.setGravity(Gravity.CENTER, 200, 100);

LinearLayout linearLayout = new LinearLayout(ToastActivity.this);

ImageView mImageView = new ImageView(ToastActivity.this);

mImageView.setImageResource(R.drawable.shuangta);

linearLayout.addView(mImageView);

mToast.setView(linearLayout);

}

}

layout布局文件activity_toast.xml

普通Toast运行效果：

带图片的Toast运行效果：