我是android的新应用构建器。我正在尝试BLE GATT服务应用程序的教程。它应该检测BLE设备并显示适当的GATT服务。我正确地遵循了本教程，并调整了其他必要的内容，例如位置权限。但是我的应用程序不断崩溃。它甚至还没有开始。
这是我的清单文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:dist="http://schemas.android.com/apk/distribution"
package="com.example.appgatt">
<dist:module dist:instant="true" />
<uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application android:label="@string/app_name"
android:icon="@drawable/ic_launcher_foreground"
android:theme="@style/ThemeOverlay.AppCompat.Dark">
<activity android:name=".DeviceScanActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".DeviceControlActivity"/>
<service android:name=".BluetoothLeService" android:enabled="true"/>
</application>
</manifest>
这是我的DeviceScanActivity类文件：
public class DeviceScanActivity extends ListActivity {
private LeDeviceListAdapter mLeDeviceListAdapter;
private BluetoothAdapter mBluetoothAdapter;
private boolean mScanning;
private Handler mHandler;
private static final int REQUEST_ENABLE_BT = 1;
private static final long SCAN_PERIOD = 7500;
private static final int LOCATION_REQUEST = 255;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActionBar().setTitle(R.string.title_devices);
mHandler = new Handler();
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT).show();
finish();
}
final BluetoothManager bluetoothManager =
(BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = bluetoothManager.getAdapter();
if (mBluetoothAdapter == null) {
Toast.makeText(this, R.string.error_bluetooth_not_supported, Toast.LENGTH_SHORT).show();
finish();
return;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
if (!mScanning) {
menu.findItem(R.id.menu_stop).setVisible(false);
menu.findItem(R.id.menu_scan).setVisible(true);
menu.findItem(R.id.menu_refresh).setActionView(null);
} else {
menu.findItem(R.id.menu_stop).setVisible(true);
menu.findItem(R.id.menu_scan).setVisible(false);
menu.findItem(R.id.menu_refresh).setActionView(
R.layout.actionbar_indeterminate_progress);
}
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_scan:
mLeDeviceListAdapter.clear();
scanLeDevice(true);
break;
case R.id.menu_stop:
scanLeDevice(false);
break;
}
return true;
}
@Override
protected void onResume() {
super.onResume();
if (!mBluetoothAdapter.isEnabled()) {
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
mLeDeviceListAdapter = new LeDeviceListAdapter();
setListAdapter(mLeDeviceListAdapter);
scanLeDevice(true);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_ENABLE_BT && resultCode == Activity.RESULT_CANCELED) {
finish();
return;
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
protected void onPause() {
super.onPause();
scanLeDevice(false);
mLeDeviceListAdapter.clear();
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
final BluetoothDevice device = mLeDeviceListAdapter.getDevice(position);
if (device == null) return;
final Intent intent = new Intent(this, DeviceControlActivity.class);
intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_NAME, device.getName());
intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_ADDRESS, device.getAddress());
if (mScanning) {
mBluetoothAdapter.stopLeScan(mLeScanCallback);
mScanning = false;
}
startActivity(intent);
}
private void scanLeDevice(final boolean enable) {
if (enable) {
verifyPermissionAndScan();
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
mScanning = false;
mBluetoothAdapter.stopLeScan(mLeScanCallback);
invalidateOptionsMenu();
}
}, SCAN_PERIOD);
mScanning = true;
mBluetoothAdapter.startLeScan(mLeScanCallback);
} else {
mScanning = false;
mBluetoothAdapter.stopLeScan(mLeScanCallback);
}
invalidateOptionsMenu();
}
private class LeDeviceListAdapter extends BaseAdapter {
private ArrayList<BluetoothDevice> mLeDevices;
private LayoutInflater mInflator;
public LeDeviceListAdapter() {
super();
mLeDevices = new ArrayList<BluetoothDevice>();
mInflator = DeviceScanActivity.this.getLayoutInflater();
}
public void addDevice(BluetoothDevice device) {
if(!mLeDevices.contains(device)) {
mLeDevices.add(device);
}
}
public BluetoothDevice getDevice(int position) {
return mLeDevices.get(position);
}
public void clear() {
mLeDevices.clear();
}
@Override
public int getCount() {
return mLeDevices.size();
}
@Override
public Object getItem(int i) {
return mLeDevices.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
ViewHolder viewHolder;
if (view == null) {
view = mInflator.inflate(R.layout.listitem_device, null);
viewHolder = new ViewHolder();
viewHolder.deviceAddress = (TextView) view.findViewById(R.id.device_address);
viewHolder.deviceName = (TextView) view.findViewById(R.id.device_name);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
BluetoothDevice device = mLeDevices.get(i);
final String deviceName = device.getName();
if (deviceName != null && deviceName.length() > 0)
viewHolder.deviceName.setText(deviceName);
else
viewHolder.deviceName.setText(R.string.unknown_device);
viewHolder.deviceAddress.setText(device.getAddress());
return view;
}
}
private BluetoothAdapter.LeScanCallback mLeScanCallback =
new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
runOnUiThread(new Runnable() {
@Override
public void run() {
mLeDeviceListAdapter.addDevice(device);
mLeDeviceListAdapter.notifyDataSetChanged();
}
});
}
};
static class ViewHolder {
TextView deviceName;
TextView deviceAddress;
}
@TargetApi(23)
private void verifyPermissionAndScan() {
if (ContextCompat.checkSelfPermission(this, ACCESS_COARSE_LOCATION) == PERMISSION_GRANTED) {
Toast.makeText(this, R.string.location_already_given, Toast.LENGTH_LONG).show();
} else {
requestPermissions(new String[] {ACCESS_COARSE_LOCATION}, LOCATION_REQUEST);
}
}
@Override
public void onRequestPermissionsResult (int requestCode, String[] permissions, int[] grantResults) {
if (requestCode != LOCATION_REQUEST) return;
if (grantResults.length > 0 && grantResults[0] == PERMISSION_GRANTED) {
Toast.makeText(this, R.string.permission_allowed, Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, R.string.permission_not_allowed, Toast.LENGTH_LONG).show();
}
}
}
这是我的logcat：
2019-07-23 13:57:20.604 24213-24213/? E/Zygote: isWhitelistProcess - Process is Whitelisted
2019-07-23 13:57:20.605 24213-24213/? E/Zygote: accessInfo : 1
2019-07-23 13:57:20.606 24213-24213/? I/SELinux: SELinux: seapp_context_lookup: seinfo=untrusted, level=s0:c50,c270,c512,c768, pkgname=com.example.appgatt
2019-07-23 13:57:20.609 24213-24213/? I/example.appgat: Late-enabling -Xcheck:jni
2019-07-23 13:57:20.647 24213-24220/? E/example.appgat: Failed to send DDMS packet REAQ to debugger (-1 of 20): Broken pipe
2019-07-23 13:57:20.676 24213-24213/? D/ConnectivityManager_URSP: Ursp sIsUrsp=false, sIsCheckUrsp=false, uid=13634
2019-07-23 13:57:20.678 24213-24213/? D/Proxy: urspP is null: 13634
2019-07-23 13:57:20.775 24213-24213/? W/example.appgat: JIT profile information will not be recorded: profile file does not exits.
2019-07-23 13:57:20.777 24213-24213/? I/chatty: uid=13634(com.example.appgatt) identical 8 lines
2019-07-23 13:57:20.777 24213-24213/? W/example.appgat: JIT profile information will not be recorded: profile file does not exits.
2019-07-23 13:57:20.777 24213-24213/? W/example.appgat: JIT profile information will not be recorded: profile file does not exits.
2019-07-23 13:57:20.777 24213-24213/? W/example.appgat: JIT profile information will not be recorded: profile file does not exits.
2019-07-23 13:57:20.791 24213-24213/? I/InstantRun: starting instant run server: is main process
2019-07-23 13:57:20.820 24213-24237/? D/libEGL: loaded /vendor/lib64/egl/libGLES_mali.so
2019-07-23 13:57:20.837 24213-24213/? D/AndroidRuntime: Shutting down VM
2019-07-23 13:57:20.841 24213-24213/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.appgatt, PID: 24213
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.appgatt/com.example.appgatt.DeviceScanActivity}: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3092)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3235)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1926)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:6990)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)
Caused by: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
Caused by: android.view.InflateException: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:647)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at com.android.internal.policy.DecorView.onResourcesLoaded(DecorView.java:2494)
at com.android.internal.policy.PhoneWindow.generateLayout(PhoneWindow.java:2739)
at com.android.internal.policy.PhoneWindow.installDecor(PhoneWindow.java:2812)
at com.android.internal.policy.PhoneWindow.getDecorView(PhoneWindow.java:2120)
at android.app.Activity.initWindowDecorActionBar(Activity.java:2834)
at android.app.Activity.getActionBar(Activity.java:2776)
at com.example.appgatt.DeviceScanActivity.onCreate(DeviceScanActivity.java:47)
at android.app.Activity.performCreate(Activity.java:7326)
at android.app.Activity.performCreate(Activity.java:7317)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3072)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3235)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1926)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:6990)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)
Caused by: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 13: TypedValue{t=0x2/d=0x1010433 a=1}
2019-07-23 13:57:20.842 24213-24213/? E/AndroidRuntime: at android.content.res.TypedArray.getDrawableForDensity(TypedArray.java:946)
at android.content.res.TypedArray.getDrawable(TypedArray.java:930)
at android.view.View.<init>(View.java:5459)
at android.view.ViewGroup.<init>(ViewGroup.java:660)
at android.widget.FrameLayout.<init>(FrameLayout.java:92)
at android.widget.FrameLayout.<init>(FrameLayout.java:87)
at android.widget.FrameLayout.<init>(FrameLayout.java:82)
at com.android.internal.widget.ActionBarContainer.<init>(ActionBarContainer.java:73)
... 32 more
其余部分与本教程相同，因此我不在此处添加。我没有按教程中所示添加任何自定义布局资源文件，而是使用默认主题。
答案 0 :(得分：0)
问题已解决。问题出在清单文件中。刚刚在活动名称之前添加了程序包名称。