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 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();
 }
}
}

PushToast.getInstance().init(this);

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