我在检查用户是否打开蓝牙和 GPS 时遇到一些问题。
如果 GPS 关闭，“确定”图标将始终显示 GPS 激活状态。
如果蓝牙已打开，则会显示“确定”图标。但关闭时不会出现“notOK”图标。有人可以检查一下代码吗？
提前致谢!
JAVA类:
LocationManager locationManager;
Button buttongps;
Button buttonblue;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_konkurranse);
buttongps = (Button) findViewById(R.id.gps);
buttongps.setOnClickListener(onButtongpsClick);
buttonblue = (Button) findViewById(R.id.bluetooth);
buttonblue.setOnClickListener(onButtonblueClick);
);
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
ImageView img = (ImageView) findViewById(R.id.bluestatus);
img.setImageResource(R.drawable.notok);
} else {
if (mBluetoothAdapter.isEnabled()) {
ImageView img = (ImageView) findViewById(R.id.bluestatus);
img.setImageResource(R.drawable.ok);
}
}
String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(provider != null){
ImageView img = (ImageView) findViewById(R.id.gpsstatus);
img.setImageResource(R.drawable.ok);
}else{
ImageView img = (ImageView) findViewById(R.id.gpsstatus);
img.setImageResource(R.drawable.notok);
}
}
public View.OnClickListener onButtongpsClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent gpsOptionsIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(gpsOptionsIntent);
}
};
public View.OnClickListener onButtonblueClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (!mBluetoothAdapter.isEnabled()) mBluetoothAdapter.enable();
ImageView img = (ImageView) findViewById(R.id.bluestatus);
img.setImageResource(R.drawable.ok);
}
};
// More code below not related, and then removed..
XML 代码。
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_height="match_parent"
android:layout_width="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="0dp"
android:orientation="vertical"
android:weightSum="1"
android:gravity="top|bottom|center_vertical|fill_vertical|center_horizontal">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_height="50dp"
android:layout_width="wrap_content"
android:background="@drawable/actionbar"
android:minHeight="?attr/actionBarSize"
android:layout_gravity="center">
</android.support.v7.widget.Toolbar>
<ImageView
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginTop="0.1dp"
android:id="@+id/imageView"
android:src="@drawable/nttop"
android:layout_marginRight="0.94dp"
android:layout_marginLeft="0.06dp"
android:layout_marginBottom="0.05dp"
android:contentDescription="fblogin"
android:scaleType="fitXY" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="SOME test here woop woop"
android:id="@+id/intro"
android:layout_gravity="center_horizontal"
android:layout_marginTop="0.1dp"
android:layout_marginLeft="0.06dp"
android:layout_marginRight="0.94dp"
android:layout_marginBottom="20dp"
android:background="#ffffffff"
android:textSize="20dp"
android:layout_weight="0" />
<LinearLayout
android:layout_width="307dp"
android:layout_height="wrap_content"
android:weightSum="1">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tel"
android:background="@android:color/transparent"
android:src="@drawable/tel"
android:contentDescription="tel"
android:layout_gravity="left|center" />
<EditText
android:layout_width="200dp"
android:layout_height="40dp"
android:inputType="phone"
android:ems="10"
android:id="@+id/mobilnummer"
android:hint="Mobilnummer"
android:textColor="#000000"
android:background="#ffffffff"
android:autoText="false"
android:phoneNumber="false"
android:layout_weight="0.80"
android:layout_marginLeft="20dp"
android:layout_gravity="center_horizontal" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tlfstatus"
android:layout_gravity="right"
android:contentDescription="notok" />
</LinearLayout>
<LinearLayout
android:layout_width="307dp"
android:layout_height="wrap_content"
android:weightSum="1">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/gpsicon"
android:src="@drawable/gps"
android:background="@android:color/transparent"
android:contentDescription="gps"
android:layout_gravity="left|center" />
<Button
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="Click here for GPS"
android:id="@+id/gps"
android:layout_gravity="center_horizontal"
android:layout_weight="0.76"
android:layout_marginLeft="20dp" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/gpsstatus"
android:layout_gravity="right"
android:background="@android:color/transparent"
android:contentDescription="notok" />
</LinearLayout>
<LinearLayout
android:layout_width="307dp"
android:layout_height="wrap_content"
android:weightSum="1">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/blueicon"
android:src="@drawable/bluetooth"
android:background="@android:color/transparent"
android:contentDescription="blue"
android:layout_gravity="left|center" />
<Button
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="Bluetooth"
android:id="@+id/bluetooth"
android:layout_weight="0.76"
android:layout_marginLeft="20dp"
android:layout_gravity="center_horizontal" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/bluestatus"
android:background="@android:color/transparent"
android:layout_gravity="right"
android:contentDescription="notok" />
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/info"
android:layout_gravity="bottom|center_horizontal"
android:text="Woop thank you text /fix later " />
</LinearLayout>
<ListView
android:id="@+id/drawer"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="0dp"
android:background="@drawable/menu"
android:layout_width="240dp"
android:layout_height="fill_parent"
android:drawSelectorOnTop="false">
</ListView>
</android.support.v4.widget.DrawerLayout>
最佳答案
我认为检查是错误的。
尝试以下蓝牙检查
final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
final ImageView btImg = (ImageView) findViewById(R.id.bluestatus);
if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
btImg.setImageResource(R.drawable.notok);
} else {
btImg.setImageResource(R.drawable.ok);
}
还可以尝试以下 GPS 操作
final LocationManager manager = (LocationManager) getSystemService( Context.LOCATION_SERVICE );
final ImageView gpsImg = (ImageView) findViewById(R.id.gpsstatus);
if (manager.isProviderEnabled( LocationManager.GPS_PROVIDER ) ) {
gpsImg.setImageResource(R.drawable.ok);
} else {
gpsImg.setImageResource(R.drawable.notok);
}
关于java - 检查 GPS 和蓝牙是否已激活时出现问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30712677/