英文:
How to set On back option for Navigation and Current activity
问题
我创建了一个带有列表视图的应用程序，当我从主页点击返回按钮时，它会弹出一个消息并询问是否要退出。之后，我实现了一个导航抽屉并进行了打开和关闭的设置。但是，当我从导航栏点击返回按钮返回并弹出我设置在主页上的消息时，
@Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("您确定要退出吗？")
.setCancelable(false)
.setPositiveButton("是的", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
AdminHome.super.onBackPressed();
}
})
.setNegativeButton("否", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
如何在我从导航栏点击返回时停止弹出消息，并将消息设置为从主页弹出。
英文:
I have a created a app with List view when i click back button from home page it will toast a message and ask to exit or not. after i have implement a Navigation drawer and set open and close. but when i click back button from navigation go back and popup the toast which i set to hoe page.
@Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else{
super.onBackPressed();
}
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to Exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
AdminHome.super.onBackPressed();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
how to stop the toast message when i click back from navigation bar and set toast from home page.
答案1
得分: 0
把 AlertDialog 代码放在 else 块中。
英文:
Put the AlertDialog code in else block.
答案2
得分: 0
@Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("确定要退出吗？")
.setCancelable(false)
.setPositiveButton("是的", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
AdminHome.super.onBackPressed();
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
}
英文:
hi You can change your code like this
@Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to Exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
AdminHome.super.onBackPressed();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
}
答案3
得分: 0
把你的警示对话框放在条件的 else 里面：
@Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("确定要退出吗？")
.setCancelable(false)
.setPositiveButton("是", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
super.onBackPressed();
}
})
.setNegativeButton("否", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
}
英文:
Put your alertdialog inside else of your condition
@Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to Exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
super.onBackPressed();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
}
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