代码如下：
public class TimeDialog extends Dialog {
private ImageButton quit;
private TextView calendar;
private ImageButton close;
private FixedGridView times;
private Button btn;
public TimeDialog(Context context) {
super(context, R.style.ShadowDialog);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dialog_time);
Window window = getWindow();
window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
window.setWindowAnimations(R.style.dialogAnimBottom);
setCanceledOnTouchOutside(false);
quit = (ImageButton) findViewById(R.id.time_quit);
calendar = (TextView) findViewById(R.id.time_calendar);
close = (ImageButton) findViewById(R.id.time_close);
times = (FixedGridView) findViewById(R.id.time_times);
btn = (Button) findViewById(R.id.time_btn);
data = new ArrayList< >();
adapter = new TimeAdapter(data);
times.setAdapter(adapter);
}
}
布局：
< ?xml version="1.0" encoding="utf-8"? >
< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:padding="@dimen/common_20dp" >
< LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/common_20dp"
android:gravity="center"
android:orientation="horizontal"
android:background="@color/white" >
< ImageButton
android:id="@+id/time_quit"
android:layout_width="@dimen/common_25dp"
android:layout_height="@dimen/common_40dp"
android:background="@mipmap/btn_quit_gray"/ >
< LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="@dimen/common_15dp"
android:gravity="center"
android:orientation="vertical" >
< TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="请选择服务日期"
android:textSize="@dimen/common_28sp"
android:textColor="@color/black"/ >
< TextView
android:id="@+id/time_calendar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/common_10dp"
android:text="请选择服务日期"
android:textSize="@dimen/common_26sp"
android:textColor="@color/txt_gray_80"/ >
< /LinearLayout >
< ImageButton
android:id="@+id/time_close"
android:layout_width="@dimen/common_40dp"
android:layout_height="@dimen/common_40dp"
android:background="@mipmap/btn_close_gray"/ >
< /LinearLayout >
< LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/common_20dp"
android:background="@color/offwhite"
android:gravity="center"
android:orientation="vertical" >
< com.paisen.d.beautifuknock.view.FixedGridView
android:id="@+id/time_times"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:verticalSpacing="@dimen/common_10dp"
android:horizontalSpacing="@dimen/common_10dp"
android:gravity="center"
android:numColumns="4"/ >
< /LinearLayout >
< LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/common_20dp"
android:gravity="center"
android:background="@color/white"
android:orientation="horizontal" >
< Button
android:id="@+id/time_btn"
android:layout_width="@dimen/common_180dp"
android:layout_height="@dimen/common_80dp"
android:background="@drawable/bg_yellow"
android:text="确定"
android:textColor="@color/white"
android:textSize="@dimen/common_28sp"/ >
< /LinearLayout >
< /LinearLayout >
回复讨论(解决方案)
因为存在LinearLayout的嵌套，获取LinearLayout内控件的值需要先获取LinearLayout后再去找里面的控件。 比如：
LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
ImageButton b1 = (ImageButton)layout.findViewById(R.id.b1);
【Android Stidio 开发 初始化控件空指针】相关文章：
★ Android应用开发UI控件ImageSwitcher的使用