Android Toast 使用总结

本文内容

• 环境
• 演示 Toast 使用

环境

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• Windows 2008 R2 64 位
• Eclipse ADT V22.6.2，Android 4.4.3
• 三星 SM-G3508，Android OS 4.1

演示 Toast 使用

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渐进演示如何使用 Toast。

图 1 左：主程序；中：点击“默认 Toast”；右：点击“自定义位置 Toast”

图 2 左：点击“带图片 Toast”；中：点击“自定义 Toast”；右：“来自其他线程 Toast”

main.xml 文件，只是六个按钮；Toast 也可以将 custom.xml 文件作为信息提示，具体下载 Demo，此处略，核心代码瑞安所示：

package com.example.toastdemo.activity;

import com.example.toastdemo.R;

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.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

    Handler handler = new Handler();

    Toast toast = null;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        findViewById(R.id.btnSimpleToast).setOnClickListener(

                new View.OnClickListener() {

                    @Override

                    public void onClick(View v) {

                        Toast.makeText(getApplicationContext(), "默认Toast",

                                Toast.LENGTH_SHORT).show();

                    }

                });

        findViewById(R.id.btnSimpleToastWithCustomPosition).setOnClickListener(

                new View.OnClickListener() {

                    @Override

                    public void onClick(View v) {

                        toast = Toast.makeText(getApplicationContext(),

                                "自定义位置Toast", Toast.LENGTH_LONG);

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

                        toast.show();

                    }

                });

        findViewById(R.id.btnSimpleToastWithImage).setOnClickListener(

                new View.OnClickListener() {

                    @Override

                    public void onClick(View v) {

                        toast = Toast.makeText(getApplicationContext(),

                                "带图片Toast", Toast.LENGTH_LONG);

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

                        LinearLayout toastView = (LinearLayout) toast.getView();

                        ImageView image1 = new ImageView(

                                getApplicationContext());

                        image1.setImageResource(R.drawable.icon);

                        toastView.addView(image1, 0);

                        toast.show();

                    }

                });

        findViewById(R.id.btnCustomToast).setOnClickListener(

                new View.OnClickListener() {

                    @Override

                    public void onClick(View v) {

                        LayoutInflater inflater = getLayoutInflater();

                        View layout = inflater.inflate(R.layout.custom,

                                (ViewGroup) findViewById(R.id.llToast));

                        ImageView image2 = (ImageView) layout

                                .findViewById(R.id.tvImageToast);

                        image2.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("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();

                    }

                });

        findViewById(R.id.btnRunToastFromOtherThread).setOnClickListener(

                new View.OnClickListener() {

                    @Override

                    public void onClick(View v) {

                        new Thread(new Runnable() {

                            public void run() {

                                showToast();

                            }

                        }).start();

                    }

                });

    }

    public void showToast() {

        handler.post(new Runnable() {

            @Override

            public void run() {

                Toast.makeText(getApplicationContext(), "来自其他线程Toast",

                        Toast.LENGTH_SHORT).show();

            }

        });

    }

}

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

下载 Demo