自烤面包的android

问题描述

荫试图changebackground和烤面包片的使用文本颜色在我的应用

  LayoutInflater infator = getLayoutInflater（）;
            查看布局= infator.inflate（R.layout.toast，（ViewGroup中）findViewById（R.id.toast_layout））;
            TextView的toastText =（TextView中）findViewById（R.id.toasttext）;
            toastText.setBackgroundColor（Color.YELLOW）;
            toastText.setText（UEI：+ o.getUei（））;
            吐司面包=新吐司（getApplicationContext（））;
            toast.setDuration（Toast.LENGTH_LONG）;
            toast.setView（布局）;
            toast.show（）;
 

这code是present在我的列表视图中OnItemClickListener。

但是，应用程序被力空指针异常!!

关闭

这是什么abve的onclick监听器，它可以提供更好的图片。

 公共无效的onCreate（最终捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.alarms）;
        m_alarmAdapter =新AlarmAdapter（这一点，R.layout.severity_item，m_alarms）;
        setListAdapter（m_alarmAdapter）;
        ListView的LV = getListView（）;
                lv.setOnItemClickListener（新OnItemClickListener（）{
            公共无效onItemClick（最终适配器视图＆LT;＆GT;母公司，最终视图中查看，最终诠释的位置，最终长的id）{
                Log.d（TAG，点击+视图）;
                最后报警O = m_alarmAdapter.getItem（位置）;
                LayoutInflater infator = getLayoutInflater（）;
 

解决方案

你问你的当前视图来寻找 toasttext 的ID，而不是你刚才下载查看。尝试 layout.findViewById（）

Iam trying to changebackground and text color of toast in my application using

LayoutInflater infator = getLayoutInflater();
            View layout =infator.inflate(R.layout.toast, (ViewGroup) findViewById(R.id.toast_layout));
            TextView toastText = (TextView) findViewById(R.id.toasttext);
            toastText.setBackgroundColor(Color.YELLOW);
            toastText.setText("uei:"+o.getUei());
            Toast toast = new Toast(getApplicationContext());
            toast.setDuration(Toast.LENGTH_LONG);
            toast.setView(layout);
            toast.show();

This code is present in OnItemClickListener of my listview.

But the application gets force closed with null pointer exception!!

this is what abve the onclick listener, which could give a better picture.

public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.alarms);
        m_alarmAdapter = new AlarmAdapter(this, R.layout.severity_item, m_alarms);
        setListAdapter(m_alarmAdapter);
        ListView lv = getListView();
                lv.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(final AdapterView<?> parent, final View view, final int position, final long id) {
                Log.d(TAG, "clicked: " + view);
                final Alarm o = m_alarmAdapter.getItem(position);
                LayoutInflater infator = getLayoutInflater();

解决方案

You are asking your current view to look for the toasttext id, not the View you just loaded. Try layout.findViewById()

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