Toast用于向用户显示一些帮助/提示。下面我做了5中效果,来说明Toast的强大,定义一个属于你自己的Toast。
1.默认效果
代码
Toast.makeText(getApplicationContext(),
"默认Toast样式",
Toast.LENGTH_SHORT).show();
2.自定义显示位置效果
代码
toast =
Toast.makeText(getApplicationContext(),
"自定义位置Toast",
Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER,
0, 0);
toast.show();
3.带图片效果
代码
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();
4.完全自定义效果
代码
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();
5.其他线程
代码
new Thread(new Runnable()
{
public void run()
{
showToast();
}
}).start();
完整代码
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;
}
}
}
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="默认"></Button>
<Button
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:text="自定义显示位置"
android:id="@+id/btnSimpleToastWithCustomPosition"></Button>
<Button
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:id="@+id/btnSimpleToastWithImage"
android:text="带图片"></Button>
<Button
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:text="完全自定义"
android:id="@+id/btnCustomToast"></Button>
<Button
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:text="其他线程"
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>