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。
注意:
LENGTH_LONG—长时间显示视图或文本提示
LENGTH_SHORT—短时间显示视图或文本提示
setGravity(int gravity,int xOffset,int yOffset)—设置提示应该在屏幕上的显示的位置
setDuration(int duartion)—设置提示显示的持续时间
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>