android通过自定义toast实现悬浮通知效果的示例代码

import android.content.Context;import android.os.Build;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.WindowManager;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.Map;import cn.droidlover.xdroidmvp.router.Router;import io.slife.wallet.R;import io.slife.wallet.config.IntentKey;import io.slife.wallet.ui.NewsFlashDetailActivity;public class PushToast {private AppCompatActivity mActivity;private static PushToast mInstance;private Toast mToast;private final int SHOW = 1;private final int HIDE = 0;private Object mTN;private Method mShow;private Method mHide;private Field mViewFeild;private long durationTime = 5*1000;public static PushToast getInstance() { if (mInstance == null) {  mInstance = new PushToast(); } return mInstance;}public void init(AppCompatActivity activity) { mActivity = activity;}public void createToast(String title, String content, Map<String,String> params) { if (mActivity == null) {  return; } LayoutInflater inflater = mActivity.getLayoutInflater();//调用Activity的getLayoutInflater()//  LayoutInflater inflater = (LayoutInflater) context.getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); View view = inflater.inflate(R.layout.view_push_toast, null); //加載layout下的布局 LinearLayout llPushContent = (LinearLayout) view.findViewById(R.id.ll_push_content); TextView tvTitle = (TextView) view.findViewById(R.id.tv_title); TextView tvContent = (TextView) view.findViewById(R.id.tv_content); tvTitle.setText(title); tvContent.setText(content); mToast = new Toast(mActivity); mToast.setView(view); mToast.setDuration(Toast.LENGTH_LONG); mToast.setGravity(Gravity.TOP, 0, 0); reflectEnableClick(); reflectToast(); llPushContent.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {   String newsFlashId = params.get("InformationID");   Router.newIntent(mActivity).to(NewsFlashDetailActivity.class).putString(IntentKey.NEWS_FLASH_ID,newsFlashId).launch();   handler.sendEmptyMessage(HIDE);  } }); if(mShow != null && mHide != null){  handler.sendEmptyMessage(SHOW); }else{  mToast.show(); }}private void reflectEnableClick() { try {  Object mTN;  mTN = getField(mToast, "mTN");  if (mTN != null) {   Object mParams = getField(mTN, "mParams");   if (mParams != null     && mParams instanceof WindowManager.LayoutParams) {    WindowManager.LayoutParams params = (WindowManager.LayoutParams) mParams;    //显示与隐藏动画//     params.windowAnimations = R.style.ClickToast;    //Toast可点击    params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON      | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;    //设置viewgroup宽高    params.width = WindowManager.LayoutParams.MATCH_PARENT; //设置Toast宽度为屏幕宽度    params.height = WindowManager.LayoutParams.WRAP_CONTENT; //设置高度   }  } } catch (Exception e) {  e.printStackTrace(); }}/** * 反射字段 * * @param object 要反射的对象 * @param fieldName 要反射的字段名称 */private static Object getField(Object object, String fieldName)  throws NoSuchFieldException, IllegalAccessException { Field field = object.getClass().getDeclaredField(fieldName); if (field != null) {  field.setAccessible(true);  return field.get(object); } return null;}private Handler handler = new Handler() { @Override public void handleMessage(Message msg) {  super.handleMessage(msg);  switch (msg.what) {   case SHOW:    handler.sendEmptyMessageDelayed(HIDE, durationTime);    show();    break;   case HIDE:    hide();    break;  } }};public void reflectToast() { Field field = null; try {  field = mToast.getClass().getDeclaredField("mTN");  field.setAccessible(true);  mTN = field.get(mToast);  mShow = mTN.getClass().getDeclaredMethod("show");  mHide = mTN.getClass().getDeclaredMethod("hide");  mViewFeild = mTN.getClass().getDeclaredField("mNextView");  mViewFeild.setAccessible(true); } catch (NoSuchFieldException e) {  e.printStackTrace(); } catch (IllegalAccessException e) {  e.printStackTrace(); } catch (IllegalArgumentException e) {  e.printStackTrace(); } catch (NoSuchMethodException e1) {  e1.printStackTrace(); }}public void show() { try {  //android4.0以上就要以下处理  if (Build.VERSION.SDK_INT > 14) {   Field mNextViewField = mTN.getClass().getDeclaredField("mNextView");   mNextViewField.setAccessible(true);   LayoutInflater inflate = (LayoutInflater) mActivity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);   View v = mToast.getView();   mNextViewField.set(mTN, v);   Method method = mTN.getClass().getDeclaredMethod("show", null);   method.invoke(mTN, null);  }  mShow.invoke(mTN, null); } catch (Exception e) {  e.printStackTrace(); }}private void hide() { try {  mHide.invoke(mTN, null); } catch (IllegalAccessException e) {  e.printStackTrace(); } catch (IllegalArgumentException e) {  e.printStackTrace(); } catch (InvocationTargetException e) {  e.printStackTrace(); }catch (NullPointerException ex){  ex.printStackTrace(); }}}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/ll_push_content"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="@drawable/bg_push_message"android:orientation="vertical"><TextView android:id="@+id/tv_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:textColor="@color/black" android:text="标题" android:maxLines="2" android:ellipsize="end" android:textStyle="bold" android:textSize="@dimen/text_size_14" /><TextView android:id="@+id/tv_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:textColor="@color/black_808080" android:textSize="@dimen/text_size_13" android:maxLines="3" android:ellipsize="end" android:layout_marginTop="@dimen/margin_large" android:text="1"/></LinearLayout>

PushToast.getInstance().init(this);

PushToast.getInstance().createToast(msg.title,msg.text,umengPushEntity.getExtraMap());