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添加工具欄後,下面的Android開發人員API決定將背景顏色更改爲透明,因爲我想要放置在頂部角落的微調框。當我這樣做,溢出按鈕(三個點)就不復存在了將Android工具欄更改爲透明顏色後溢出按鈕丟失
這裏是設置工具欄的代碼:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("");
Toolbar myToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(myToolbar);
Spinner spinner = (Spinner) findViewById(R.id.spinner);
spinner.setOnItemSelectedListener(this);
ArrayAdapter<CharSequence> adapter =
ArrayAdapter.createFromResource(this, R.array.Instruments, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
}
的XML佈局:
<android.support.v7.widget.Toolbar
android:id="@+id/my_toolbar"
android:layout_width="368dp"
android:layout_height="56dp"
android:background="@android:color/holo_orange_dark"
android:elevation="4dp"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="@mipmap/ic_launcher"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="0dp" />
<Spinner
android:id="@+id/spinner"
android:layout_width="190dp"
android:layout_height="34dp"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="56dp" />