ToastUtil工具类

步骤一：新建ToastUtil类

public class ToastUtil {

private static ToastUtilmToastUtil;

private ContextmContext;

private ToastmToast;

public static ToastUtil init(Context context) {

if (mToastUtil ==null) {

mToastUtil =new ToastUtil(context);

}

return mToastUtil;

}

public static ToastUtil getInstance() {

if (mToastUtil ==null) {

throw new NullPointerException("请在Application中初始化ToastUtil");

}

return mToastUtil;

}

private ToastUtil(Context context) {

mContext = context;

init();

}

/**

    * toast string消息,时间2秒

    *

    * @param msg

    */

    public void showToast(String msg) {

mToast.setText(msg);

mToast.setDuration(Toast.LENGTH_SHORT);

mToast.show();

}

/**

    * toast string消息,时间2秒

    *

    * @param msg

    */

    public void showToast(String msg,int time) {

mToast.setText(msg);

mToast.setDuration(time);

mToast.show();

}

/**

    * toast string消息,时间2秒

    *

    * @param resId

    */

    public void showToast(int resId) {

mToast.setText(mContext.getResources().getString(resId));

mToast.setDuration(Toast.LENGTH_SHORT);

mToast.show();

}

private void init() {

LogUtil.e("ToastUtil","初始化ToastUtil");

mToast = Toast.makeText(mContext,"", Toast.LENGTH_SHORT);

}

}

步骤二：在Application类的onCreate()方法里调用

ToastUtil.init(getApplicationContext());