Toast

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 = newImageView(getApplicationContext());
   imageCodeProject.setImageResource(R.drawable.icon);
   toastView.addView(imageCodeProject, 0);
   toast.show();

4.完全自定义效果

代码

LayoutInflaterinflater = 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(newRunnable() {
    public void run() {
     showToast();
    }
   }).start();

完整代码

1.Main,java

packagecom.wjq.toast;

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

public class Mainextends Activity implements OnClickListener {
Handlerhandler = new Handler();

@Override
publicvoid 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 voidshowToast() {
  handler.post(newRunnable() {

   @Override
   publicvoid run() {
    Toast.makeText(getApplicationContext(),"我来自其他线程！",
      Toast.LENGTH_SHORT).show();

   }
  });
}

@Override
publicvoid onClick(View v) {
  Toasttoast = null;
  switch(v.getId()) {
  caseR.id.btnSimpleToast:
   Toast.makeText(getApplicationContext(),"默认Toast样式",
     Toast.LENGTH_SHORT).show();
   break;
  caseR.id.btnSimpleToastWithCustomPosition:
   toast= Toast.makeText(getApplicationContext(),
     "自定义位置Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER,0, 0);
   toast.show();
   break;
  caseR.id.btnSimpleToastWithImage:
   toast= Toast.makeText(getApplicationContext(),
     "带图片的Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER,0, 0);
   LinearLayouttoastView = (LinearLayout) toast.getView();
   ImageViewimageCodeProject = new ImageView(getApplicationContext());
   imageCodeProject.setImageResource(R.drawable.icon);
   toastView.addView(imageCodeProject,0);
   toast.show();
   break;
  caseR.id.btnCustomToast:
   LayoutInflaterinflater = getLayoutInflater();
   Viewlayout = inflater.inflate(R.layout.custom,
     (ViewGroup)findViewById(R.id.llToast));
   ImageViewimage = (ImageView) layout
     .findViewById(R.id.tvImageToast);
   image.setImageResource(R.drawable.icon);
   TextViewtitle = (TextView) layout.findViewById(R.id.tvTitleToast);
   title.setText("Attention");
   TextViewtext = (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;
  caseR.id.btnRunToastFromOtherThread:
   newThread(new Runnable() {
    publicvoid run() {
     showToast();
    }
   }).start();
   break;

  }

}
}

2.main,xml

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">
  android:layout_width="fill_parent"android:id="@+id/btnSimpleToast"
  android:text="默认">
  android:layout_width="fill_parent"android:text="自定义显示位置"
  android:id="@+id/btnSimpleToastWithCustomPosition">
  android:layout_width="fill_parent"android:id="@+id/btnSimpleToastWithImage"
  android:text="带图片">
  android:layout_width="fill_parent"android:text="完全自定义"
  android:id="@+id/btnCustomToast">
  android:layout_width="fill_parent"android:text="其他线程"
  android:id="@+id/btnRunToastFromOtherThread">

3.custom.xml

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">
  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"/>
  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">
      android:layout_height="wrap_content"
   android:layout_gravity="center"
   android:layout_width="wrap_content"
   android:id="@+id/tvImageToast"/>
      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"/>