如何解决安卓 |如何在显示下一个对话之前关闭上一个对话?
我有针对不同条件的多个对话框。当我为一种情况显示对话时,然后我尝试为另一种情况显示另一种对话。它与前一个重叠。
特定场景
我有两个对话。一种用于 wifi 未激活的情况。另一种是当wifi处于活动状态时。假设当我启动应用程序时,wifi 未处于活动状态。所以,它显示了一个对话。然后我打开了wifi。它展示了另一个对话。但是,它与前一个重叠。在下面的屏幕截图中,通过查看对话框的阴影可以清楚地看到。左一是当wifi打开时。然后我关闭了wifi并再次打开。而这种重叠发生了。
Java 代码
private BroadcastReceiver wifiStateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context,Intent intent) {
int wifiStateExtra = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,WifiManager.WIFI_STATE_UNKNOWN);
switch (wifiStateExtra) {
case WifiManager.WIFI_STATE_ENABLED:
//WIFI ENABLED
{
info = wifiManager.getConnectionInfo();
if (!info.getSSID().trim().equals(ssid)) {
title = "Connect to Devil";
msg = "In order to work with system you need to be connected with Devil";
builder.setTitle(title);
builder.setMessage(msg);
builder.setPositiveButton("OK",(dialog,which) -> startActivity(WiFiIntent));
builder.setNegativeButton("Close App",((dialog,which) -> finishAffinity()));
alertDialog = builder.create();
alertDialog.show();
alertDialog.setCancelable(false);
}
break;
}
case WifiManager.WIFI_STATE_DISABLED:
//WIFI DISABLED
{
title = "Enable WiFi";
msg = "Please enable wifi and connect to Devil";
builder.setTitle(title);
builder.setMessage(msg);
builder.setPositiveButton("OK",which) -> startActivity(WiFiIntent));
builder.setNegativeButton("Close App",which) -> finishAffinity()));
alertDialog = builder.create();
alertDialog.show();
alertDialog.setCancelable(false);
break;
}
}
}
};
解决方法
在显示下一个对话框之前,您必须关闭上一个显示的对话框。
请检查此代码,它可以根据您的要求正常工作
public class MainActivity extends AppCompatActivity {
private MaterialAlertDialogBuilder materialDialog;
private AlertDialog dialog;
private String title;
private String msg;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
materialDialog = new MaterialAlertDialogBuilder(this);
}
@Override
protected void onStart() {
super.onStart();
IntentFilter intentFilter = new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION);
registerReceiver(wifiStateReceiver,intentFilter);
}
@Override
protected void onStop() {
super.onStop();
unregisterReceiver(wifiStateReceiver);
}
private final BroadcastReceiver wifiStateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context,Intent intent) {
int wifiStateExtra = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,WifiManager.WIFI_STATE_UNKNOWN);
switch (wifiStateExtra) {
case WifiManager.WIFI_STATE_ENABLED:
title = "Connected";
msg = "Wifi Enabled.";
materialDialog.setPositiveButton("ok",(dialogInterface,i) -> {
dialogInterface.dismiss();
}).setNegativeButton("close",i) -> {
dialogInterface.dismiss();
showToast(msg);
});
break;
case WifiManager.WIFI_STATE_DISABLED:
title = "disconnected";
msg = "Wifi Disabled.";
materialDialog.setPositiveButton("ok",i) -> {
dialogInterface.dismiss();
showToast(msg);
});
break;
}
if (dialog != null && dialog.isShowing()) {
dialog.dismiss();
}
dialog = materialDialog.setTitle(title).setMessage(msg).create();
dialog.show();
}
};
private void showToast(String msg) {
Toast.makeText(this,msg,Toast.LENGTH_SHORT).show();
}
}
,
只需在重新分配 cancel
之前调用 alertDialog
:
...
alertDialog.cancel(); // add this line
alertDialog = builder.create();
...
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。