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随时随地学Java
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();@Overridepublic 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() {? [email protected]? ?public void run() {? ? Toast.makeText(getApplicationContext(), "我来自其他线程！",? ? ? Toast.LENGTH_SHORT).show();? ?}? });}@Overridepublic 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"?><LinearLayoutxmlns: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>
关注微信号：javalearns?? 随时随地学Java
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随时随地学Java