java如何使用onSaveInstanceState保存复选框状态
我有一个警报对话框，其中显示了几个复选框（更确切地说是5个）。该复选框过滤“我的地图”上显示的5个标记列表，这些标记按小时间隔分组。我已经设法使一切工作，除了我不知道如何在onSaveInstanceState中编写代码，以便在屏幕旋转后保留复选框值。这是我认为与问题相关的代码部分。提前感谢您的帮助
public void filterTheMarkers(View view) {
if (dialog == null) {
AlertDialog.Builder builder;
builder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
@SuppressLint("InflateParams") View checkBoxView = inflater.inflate(R.layout.markers_filtering, null);
builder.setView(checkBoxView);
cbAllDay = (CheckBox) checkBoxView.findViewById(R.id.checkBox1);
cbBefore12 = (CheckBox) checkBoxView.findViewById(R.id.checkBox2);
cbBetween1216 = (CheckBox) checkBoxView.findViewById(R.id.checkBox3);
cbBetween1620 = (CheckBox) checkBoxView.findViewById(R.id.checkBox4);
ccbAfter20 = (CheckBox) checkBoxView.findViewById(R.id.checkBox5);
dialog = builder.create();
}
dialog.show();
}
public void displaySelectedMarkers(View view) {
dialog.dismiss();
Log.i("TAG", "All Day " + cbAllDay.isChecked() + " Before 12 " + cbBefore12.isChecked() + " Between 12-16 " + cbBetween1216.isChecked() + " Between 16-20" + cbBetween1620.isChecked() + " After 20 " + ccbAfter20.isChecked());
//according these check boxes status execute your code to show/hide markers
if (cbAllDay.isChecked() && cbBefore12.isChecked() && cbBetween1216.isChecked() && cbBetween1620.isChecked() && ccbAfter20.isChecked()) {
// show all markers
for (Marker marker : allDayList) {
marker.setVisible(true);
}
for (Marker marker : before12List) {
marker.setVisible(true);
}
for (Marker marker : between1216List) {
marker.setVisible(true);
}
for (Marker marker : between1620List) {
marker.setVisible(true);
}
for (Marker marker : after20List) {
marker.setVisible(true);
}
} else if (cbAllDay.isChecked() && !cbBefore12.isChecked() && !cbBetween1216.isChecked() && !cbBetween1620.isChecked() && !ccbAfter20.isChecked()) {
// show only All Day Markers
for (Marker marker : allDayList) {
marker.setVisible(true);
}
for (Marker marker : before12List) {
marker.setVisible(false);
}
for (Marker marker : between1216List) {
marker.setVisible(false);
}
for (Marker marker : between1620List) {
marker.setVisible(false);
}
for (Marker marker : after20List) {
marker.setVisible(false);
} // and it goes like this forever covering every possible interval
.
.
.
}
}
public void doNothing(View view) {
dialog.dismiss();
}
更新
。 .
Boolean keepMarkerFiltersCB1;
Boolean keepMarkerFiltersCB2;
Boolean keepMarkerFiltersCB3;
Boolean keepMarkerFiltersCB4;
Boolean keepMarkerFiltersCB5;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
if (savedInstanceState == null){
mapTypeSelected = GoogleMap.MAP_TYPE_NORMAL;
mSetCameraPosition = true;
mapFragment.setRetainInstance(true);
initialMarkers = true;
} else {
mapTypeSelected = savedInstanceState.getInt("the_map_type", GoogleMap.MAP_TYPE_NORMAL);
mSetCameraPosition = false;
initialMarkers = false;
keepMarkerFiltersCB1 = savedInstanceState.getBoolean("checkBox1");
keepMarkerFiltersCB2 = savedInstanceState.getBoolean("checkBox2");
keepMarkerFiltersCB3 = savedInstanceState.getBoolean("checkBox3");
keepMarkerFiltersCB4 = savedInstanceState.getBoolean("checkBox4");
keepMarkerFiltersCB5 = savedInstanceState.getBoolean("checkBox5");
}
public void filterTheMarkers(View view) {
if (dialog == null) {
AlertDialog.Builder builder;
builder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
@SuppressLint("InflateParams") View checkBoxView = inflater.inflate(R.layout.markers_filtering, null);
builder.setView(checkBoxView);
cbAllDay = (CheckBox) checkBoxView.findViewById(R.id.checkBox1);
cbBefore12 = (CheckBox) checkBoxView.findViewById(R.id.checkBox2);
cbBetween1216 = (CheckBox) checkBoxView.findViewById(R.id.checkBox3);
cbBetween1620 = (CheckBox) checkBoxView.findViewById(R.id.checkBox4);
ccbAfter20 = (CheckBox) checkBoxView.findViewById(R.id.checkBox5);
keepMarkerFiltersCB1 = cbAllDay.isChecked();
keepMarkerFiltersCB2 = cbBefore12.isChecked();
keepMarkerFiltersCB3 = cbBetween1216.isChecked();
keepMarkerFiltersCB4 = cbBetween1620.isChecked();
keepMarkerFiltersCB5 = ccbAfter20.isChecked();
dialog = builder.create();
}
dialog.show();
}
public void displaySelectedMarkers(View view) {
dialog.dismiss();
Log.i("TAG", "All Day " + cbAllDay.isChecked() + " Before 12 " + cbBefore12.isChecked() + " Between 12-16 " + cbBetween1216.isChecked() + " Between 16-20" + cbBetween1620.isChecked() + " After 20 " + ccbAfter20.isChecked());
//according these check boxes status execute your code to show/hide markers
if (cbAllDay.isChecked() && cbBefore12.isChecked() && cbBetween1216.isChecked() && cbBetween1620.isChecked() && ccbAfter20.isChecked()) {
// show all markers
for (Marker marker : allDayList) {
marker.setVisible(true);
}
for (Marker marker : before12List) {
marker.setVisible(true);
}
for (Marker marker : between1216List) {
marker.setVisible(true);
}
for (Marker marker : between1620List) {
marker.setVisible(true);
}
for (Marker marker : after20List) {
marker.setVisible(true);
}
} else if (cbAllDay.isChecked() && !cbBefore12.isChecked() && !cbBetween1216.isChecked() && !cbBetween1620.isChecked() && !ccbAfter20.isChecked()) {
// show only All Day Markers
for (Marker marker : allDayList) {
marker.setVisible(true);
}
for (Marker marker : before12List) {
marker.setVisible(false);
}
for (Marker marker : between1216List) {
marker.setVisible(false);
}
for (Marker marker : between1620List) {
marker.setVisible(false);
}
for (Marker marker : after20List) {
marker.setVisible(false);
}
} else if
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.
.
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("the_map_type", mapTypeSelected);
outState.putBoolean("checkBox1", keepMarkerFiltersCB1);
outState.putBoolean("checkBox2", keepMarkerFiltersCB2);
outState.putBoolean("checkBox3", keepMarkerFiltersCB3);
outState.putBoolean("checkBox4", keepMarkerFiltersCB4);
outState.putBoolean("checkbox5", keepMarkerFiltersCB5);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
savedInstanceState.get("the_map_type");
savedInstanceState.get("checkBox1");
savedInstanceState.get("checkBox2");
savedInstanceState.get("checkBox3");
savedInstanceState.get("checkBox4");
savedInstanceState.get("checkBox5");
}
private void initialLocation(double lat, double lng, float zoom){
LatLng latLng = new LatLng(lat, lng );
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(latLng, zoom);
mMap.moveCamera(update);
# 1 楼答案
“默认实现通过对层次结构中具有id的每个视图调用onSaveInstanceState（），为您处理每个实例的大部分UI状态，选中documentation。”
因此，尝试将ID设置为所有复选框
# 2 楼答案
您可以尝试以下方法