android - 单击对话框之前突出显示的列表视图 - Android
问题描述
我想
ListView
在单击警报对话框的读取按钮后突出显示单击的项目;下面的代码完美无缺,但唯一的问题是每当我单击该项目时,它会在对话框显示之前以颜色突出显示。
我怀疑我的代码中缺少,请检查一下。谢谢
MainActivity.java
private boolean[] isSelected; //global variable
text_listview = findViewById(R.id.textlistview);
arrayAdapter = new ArrayAdapter(this,R.layout.list_item, list_items);
text_listview.setAdapter(arrayAdapter);
isSelected=new boolean[arrayAdapter.getCount()];
text_listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
alert_dialog(position);
}
});
}
public void alert_dialog(final int position){
final SweetAlertDialog pDialog = new SweetAlertDialog(
text_message.this, SweetAlertDialog.WARNING_TYPE);
pDialog.setTitleText("Highlight data?");
pDialog.setContentText("Please choose the corresponding details");
pDialog.setCancelText("Unread!");
pDialog.setConfirmText("Read!");
pDialog.showCancelButton(true);
pDialog.show();
pDialog.setCancelable(false);
pDialog.setCancelClickListener(new SweetAlertDialog.OnSweetClickListener() {
@Override
public void onClick(SweetAlertDialog sDialog) {
sDialog.setTitleText("Successfully save!")
.setContentText("Item mark as Unread")
.setConfirmText("OK")
.showCancelButton(false)
.setCancelClickListener(null)
.setConfirmClickListener(null)
.changeAlertType(SweetAlertDialog.SUCCESS_TYPE);
sDialog.setCanceledOnTouchOutside(false);
isSelected[position]=false;
text_listview.setItemChecked(position,false);
}
})
.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
@Override
public void onClick(SweetAlertDialog sDialog) {
sDialog.setTitleText("Successfully save!")
.setContentText("Item mark as Read")
.setConfirmText("OK")
.showCancelButton(false)
.setCancelClickListener(null)
.setConfirmClickListener(null)
.changeAlertType(SweetAlertDialog.SUCCESS_TYPE);
sDialog.setCanceledOnTouchOutside(false);
isSelected[position]=true;
text_listview.setItemChecked(position,true);
}
})
.show();
}
布局activitymain.xml
<ListView
android:id="@+id/textlistview"
android:layout_width="match_parent"
android:choiceMode="multipleChoice"
android:layout_height="match_parent" />
可绘制的我的选择器
<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:drawable="@color/lightOrange" android:state_activated="true"
/></selector>
解决方案
selector
您可以通过以编程方式设置颜色来解决此问题,而不是使用。
因此,首先删除选择器 xml 文件,并删除其相关的布局属性。
将未读颜色添加到对话框setCancelClickListener1()
,将已读颜色添加到setConfirmClickListener
using:view.setBackgroundColor(getResources().getColor(R.color.light_orange));
view
是被点击的 ListView 行的根;你可以从onItemClick
回调的参数中得到它。
因此,更改alert_dialog()
方法的签名以接受视图:
text_listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
alert_dialog(position, view); // <<<<<<<<<< here is the change
}
});
并在对话框点击中添加调整颜色
public void alert_dialog(final int position, final View view){
final SweetAlertDialog pDialog = new SweetAlertDialog(
text_message.this, SweetAlertDialog.WARNING_TYPE);
pDialog.setTitleText("Highlight data?");
pDialog.setContentText("Please choose the corresponding details");
pDialog.setCancelText("Unread!");
pDialog.setConfirmText("Read!");
pDialog.showCancelButton(true);
pDialog.show();
pDialog.setCancelable(false);
pDialog.setCancelClickListener(new SweetAlertDialog.OnSweetClickListener() {
@Override
public void onClick(SweetAlertDialog sDialog) {
sDialog.setTitleText("Successfully save!")
.setContentText("Item mark as Unread")
.setConfirmText("OK")
.showCancelButton(false)
.setCancelClickListener(null)
.setConfirmClickListener(null)
.changeAlertType(SweetAlertDialog.SUCCESS_TYPE);
sDialog.setCanceledOnTouchOutside(false);
isSelected[position]=false;
// text_listview.setItemChecked(position,false); // No need to this line
view.setBackgroundColor(getResources().getColor(android.R.color.transparent)); // Setting a transparent color for the unread item
}
})
.setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
@Override
public void onClick(SweetAlertDialog sDialog) {
sDialog.setTitleText("Successfully save!")
.setContentText("Item mark as Read")
.setConfirmText("OK")
.showCancelButton(false)
.setCancelClickListener(null)
.setConfirmClickListener(null)
.changeAlertType(SweetAlertDialog.SUCCESS_TYPE);
sDialog.setCanceledOnTouchOutside(false);
isSelected[position]=true;
// text_listview.setItemChecked(position,true); // No need to this
view.setBackgroundColor(getResources().getColor(R.color.light_orange)); // create light_orange color resource in colors.xml
}
})
.show();
updateBooleanArray();
}
public void updateBooleanArray() {
arrayAdapter = new ArrayAdapter(this,R.layout.list_item, list_items);
text_listview.setAdapter(arrayAdapter);
arrayAdapter.notifyDataSetChanged();
boolean[] tempSelected=new boolean[arrayAdapter.getCount()];
for(int i=0;i<isSelected.length;i++)
{
tempSelected[i]=isSelected[i];
if(tempSelected[i])
{
text_listview.setItemChecked(i,true);
}
}
isSelected = tempSelected;
}
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