解决部份机型toast不显示问题

问题：部份机型不显示toast

解决方案：

1、自己在设置里面去允许通知，但是显然客户会说别的app都可以，so

2、自定义解决。查看toast的源码发现其附着在window上

源码下载地址：https://github.com/AltasT/ToastSimple

原因：

某些机型需要去设置，某些机型阉割

源码：

package com.atlas.library.widget;

import android.annotation.TargetApi;

import android.content.Context;

import android.content.res.Configuration;

import android.graphics.PixelFormat;

import android.os.Build;

import android.os.Handler;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.WindowManager;

import android.widget.TextView;

import com.atlas.library.R;

/**

 * Created by atlas on 15/4/25.

 * Email:[email protected]

 */

public class ToastUtils {

    private static final String TAG = ToastUtils.class.getSimpleName();

    private static TextView tv;

    public static final int LENGTH_LONG = 3500; // 3.5 seconds

    public static final int LENGTH_SHORT = 2000; // 2 seconds

    private static View mNextView;

    private static int mGravity, mX, mY;

    private static final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();

    private static WindowManager mWM;

    private static Handler mHanlder = new Handler();

    /**

     * init

     * @param context

     */

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)

    private static void init(Context context) {

        mY = context.getResources().getDimensionPixelSize(

                R.dimen.toast_y_offset);

        mGravity = context.getResources().getInteger(

                R.integer.config_toastDefaultGravity);

        LayoutInflater inflate = (LayoutInflater)

                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        mNextView = inflate.inflate(R.layout.transient_notification, null);

        TextView tv = (TextView) mNextView.findViewById(android.R.id.message);

        mParams.height = WindowManager.LayoutParams.WRAP_CONTENT;

        mParams.width = WindowManager.LayoutParams.WRAP_CONTENT;

        mParams.format = PixelFormat.TRANSLUCENT;

        mParams.windowAnimations = R.style.Animation_Toast;

        mParams.type = WindowManager.LayoutParams.TYPE_TOAST;

        mParams.setTitle("Toast");

        mParams.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON

                | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE

                | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;

        mWM = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

        // We can resolve the Gravity here by using the Locale for getting

        // the layout direction

        final Configuration config = mNextView.getContext().getResources().getConfiguration();

        final int gravity = Gravity.getAbsoluteGravity(mGravity, config.getLayoutDirection());

        mParams.gravity = gravity;

        if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.FILL_HORIZONTAL) {

            mParams.horizontalWeight = 1.0f;

        }

        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.FILL_VERTICAL) {

            mParams.verticalWeight = 1.0f;

        }

        mParams.x = mX;

        mParams.y = mY;

//        mParams.verticalMargin = mVerticalMargin;

//        mParams.horizontalMargin = mHorizontalMargin;

        mParams.packageName = context.getPackageName();

    }

    /**

     * Show the view for the specified duration.

     * @param context

     * @param text

     * @param duration

     */

    public static void show(final Context context, final CharSequence text, int duration) {

        if (context == null) {

            throw new RuntimeException("context is null");

        }

        if (mWM == null || mNextView == null) {

            init(context);

        }

        mHanlder.removeCallbacks(cancelRunable);

        mHanlder.post(new Runnable() {

            @Override

            public void run() {

                ((TextView) mNextView.findViewById(android.R.id.message)).setText(text);

                if (mNextView.getParent() != null)

                    mWM.removeView(mNextView);

                mWM.addView(mNextView, mParams);

            }

        });

        mHanlder.postDelayed(cancelRunable, duration);

    }

    private static Runnable cancelRunable = new Runnable() {

        @Override

        public void run() {

            cancel();

        }

    };

    /**

     * cancel toast

     */

    public static void cancel() {

        if (mNextView != null && mNextView.getParent() != null)

            mWM.removeViewImmediate(mNextView);

    }

}

参考：http://www.th7.cn/Program/Android/201406/220638.shtml