检查GPS和蓝牙是否已激活的问题

Question

如果用户打开蓝牙和gps，我会检查一些问题。

如果GPS关闭，那么＆＃34; OK＆＃34; gps被激活时，图标总是显示状态。

如果蓝牙已打开＆＃34;确定＆＃34;图标将显示。但不是＆＃34; notOK＆＃34;图标何时关闭。有人可以检查代码。

提前致谢！

JAVA课程：

    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>

Answer 1

我认为检查错了。

请尝试以下检查蓝牙

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);
}

并尝试使用以下GPS：

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);
}

Answer 2

问题是你的应用程序只在getDefaultAdapter（）为null时设置被禁用的资源（这可能不是这里的情况），所以你的代码永远不会到达你设置图像的部分。试试这个：

ImageView img = (ImageView) findViewById(R.id.bluestatus);
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) img.setImageResource(R.drawable.notok);
else img.setImageResource(mBluetoothAdapter.isEnabled() ? R.drawable.ok : R.drawable.notok);

现在，如果适配器为空或未启用，它将设置禁用按钮。

Answer 3

    // BLUETOOTH
    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);
            }
            else{
                ImageView img = (ImageView) findViewById(R.id.bluestatus);
                img.setImageResource(R.drawable.notok);
            }
        }

// GPS
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER )) { 
    ImageView img = (ImageView) findViewById(R.id.gpsstatus);
    img.setImageResource(R.drawable.notok);
} else {
   ImageView img = (ImageView) findViewById(R.id.gpsstatus);
   img.setImageResource(R.drawable.ok);
}