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我在我的操作欄上有微調導航,並有一個導航監聽器。 當活動被創建時,監聽器(下面)會選擇默認的微調項目,這意味着情況0在創建時運行,打開另一個活動。 如何在創建活動時停止註冊導航更改?Android操作欄導航
ActionBar.OnNavigationListener navigationListener = new OnNavigationListener() {
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
switch(itemPosition) {
case 0:
Intent i = new Intent(Main.this, Example.class);
startActivity(i);
break;
case 1:
Intent i2 = new Intent(Main.this, Example.class);
startActivity(i2);
break;
case 2:
Intent i3 = new Intent(Main.this, Example.class);
startActivity(i3);
break;
case 3:
Intent i4 = new Intent(Main.this, Example.class);
startActivity(i4);
break;
}
return false;
}
};
更新: 我認爲這個解決它,我宣佈一個布爾標誌,它更改爲false OnCreate中。
ActionBar.OnNavigationListener navigationListener = new OnNavigationListener() {
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
switch(itemPosition) {
case 0:
if(flag == true) {
if(Main.class == Main.class) {
} else {
Intent i = new Intent(Main.this, Main.class);
startActivity(i);
}
}
if(flag == false) {
flag = true;
}
break;
case 1:
Intent i2 = new Intent(Main.this, Example.class);
startActivity(i2);
break;
case 2:
Intent i3 = new Intent(Main.this, Example.class);
startActivity(i3);
break;
case 3:
Intent i4 = new Intent(Main.this, Example.class);
startActivity(i4);
break;
}
return false;
}
};