小编ysf*_*yln的帖子

有没有办法改变滑块拇指大小？我认为现在我们只能操纵颜色

var sliderPosition by remember { mutableStateOf(0f) }
Text(text = sliderPosition.toString())
Slider(
    value = sliderPosition,
    onValueChange = { sliderPosition = it },
    valueRange = 0f..100f,
    onValueChangeFinished = {
        // launch some business logic update with the state you hold
        // viewModel.updateSelectedSliderValue(sliderPosition)
    },
    steps = 5,
    colors = SliderDefaults.colors(
        thumbColor = MaterialTheme.colors.secondary,
        activeTrackColor = MaterialTheme.colors.secondary
    )
)

我正在使用 ActivityResult 打开一个活动，在成功购买商品后，我将关闭当前的活动，该活动包含购买过程并将数据发回。但是 Leak Canary 捕获了有关 BillingBroadcastReceiver 的内存泄漏。我初始化计费客户端OnCreate并发布onDestroy。

这是我调用的 init 方法 OnCreate

billingClient = BillingClient.newBuilder(this).setListener(this).build();
        billingClient.startConnection(new BillingClientStateListener() {
            @Override
            public void onBillingSetupFinished(int responseCode) {

                if (responseCode == BillingClient.BillingResponse.OK) {
                    // The billing client is ready. You can query purchases here.
                    loadProducts();
                } else {
                    // Error
                }

            }

            @Override
            public void onBillingServiceDisconnected() {
                // Try to restart the connection on the next request to
                Timber.d("Connection Error");
            }
        });

billingClient准备好时加载产品信息

private void loadProducts() {

if (billingClient.isReady()) …

我正在尝试实现 ExoPlayer 的Notification Manager，它运行良好，但我不想显示快退和快进按钮。我检查了文档，但找不到隐藏这些按钮的方法。有什么巧妙的方法可以隐藏它们吗？

这是我的代码

private fun initListener() {
    val playerNotificationManager: PlayerNotificationManager
    val notificationId = 1234
    val mediaDescriptionAdapter = object : PlayerNotificationManager.MediaDescriptionAdapter {
        override fun getCurrentSubText(player: Player?): String {
            return "Sub text"
        }

        override fun getCurrentContentTitle(player: Player): String {
            return "Title"
        }

        override fun createCurrentContentIntent(player: Player): PendingIntent? {
            return null
        }

        override fun getCurrentContentText(player: Player): String {
            return "ContentText"
        }

        override fun getCurrentLargeIcon(
            player: Player,
            callback: PlayerNotificationManager.BitmapCallback
        ): Bitmap? {
            return null
        }
    }

    playerNotificationManager = …

我正在尝试使用Espresso和为我的 Fragments 编写 UI 测试MockWebServer。我OkHttp Idling Resource用来告诉 Espresso 等待 API 调用完成。

但不知何故，有时我的测试有效，但有时无效，因为Espresso在服务请求之前就完成了它的工作。所以我的 recyclerView 项目点击测试失败。

我不明白为什么 espresso 不等待 API 调用？任何人都可以帮忙吗？

这是我的测试课

@MediumTest
@HiltAndroidTest
@UninstallModules(PersistenceModule::class, NetworkModule::class)
class MainFragmentTest {

    @get:Rule
    var hiltRule = HiltAndroidRule(this)

    private val mockWebServer = MockWebServer()

    @Inject
    lateinit var okHttp3IdlingResource: OkHttp3IdlingResource

    @Before
    fun setUp() {
        hiltRule.inject()
        // Prepare Mock Web Server
        mockWebServer.start(8080)
        IdlingRegistry.getInstance().register(okHttp3IdlingResource)
    }

    @Test
    fun mainFragmentTest(){

        // Prepare Mock Web Server
        mockWebServer.dispatcher = object : Dispatcher() {
            override fun dispatch(request: …

我有一个Bottom Sheet Dialog Fragment包含四个Fragment与ViewPager. 我想在onBackPressed单击时调用一个方法Bottom Sheet Dialog Fragment。OnBackPressedCallback在 my 中实施OnCreateView但未触发。有人知道为什么不叫它吗？

val callback = object : OnBackPressedCallback(true */ true means that the callback is enabled /*) {
    override fun handleOnBackPressed() {
        // Show your dialog and handle navigation
        LogUtils.d("Bottom Sheet -> Fragment BackPressed Invoked")
    }
}

// note that you could enable/disable the callback here as well by setting callback.isEnabled = true/false
requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)

我使用Google API进行语音识别,但希望限制收听时间.例如两秒钟.两秒钟后,即使用户继续说话,识别器仍应停止收听.我尝试了一些类似的EXTRA

EXTRA_SPEECH_INPUT_COMPLETE_SILENCE_LENGTH_MILLIS EXTRA_SPEECH_INPUT_MINIMUM_LENGTH_MILLIS EXTRA_SPEECH_INPUT_POSSIBLY_COMPLETE_SILENCE_LENGTH_MILLIS

但它没有帮助我.我的完整代码在这里,如果有人可以帮助我,我将不胜感激

public void promptSpeechInput()
{
    //This intent recognize the peech
    Intent i = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    i.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    i.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
    i.putExtra(RecognizerIntent.EXTRA_PROMPT, "Say Something");

    try {
        startActivityForResult(i, 100);
    }
    catch (ActivityNotFoundException a)
    {
        Toast.makeText(MainActivity.this,"Your device does not support",Toast.LENGTH_LONG).show();
    }
}

//For receiving speech input
public void onActivityResult(int request_code, int result_code, Intent i)
{
    super.onActivityResult(request_code, result_code, i);

    switch (request_code)
    {
        case 100: if(result_code == RESULT_OK && i != null)
        {
            ArrayList<String> result = i.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            resultTEXT.setText(result.get(0));
        }
            break;
    } …

我有一个RecyclerView，当单击RecyclerView项时，想要打开一个包含另一个RecyclerView的弹出窗口。差不多完成了，但是在弹出窗口中，没有显示名片视图。我不知道为什么，有人可以帮忙吗？

1- 我的主RecyclerView适配器

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>    {

private ArrayList<Mission> mDataset;
private Context mContext;

// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(ArrayList<Mission> myDataset, Context context) {
    mDataset = myDataset;
    this.mContext = context;
}

// Create new views (invoked by the layout manager)
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    // create a new view
    View v = LayoutInflater.from(mContext)
            .inflate(R.layout.mission_card_item, parent, false);
    // set the view's size, margins, paddings and layout parameters
    MyViewHolder vh …

我有一个像Facebook聊天buble的浮动视图,但与它不同,我的叠加层有一个EditText,需要具有焦点.

这是我的浮动视图代码

        //Inflate the floating view layout we created
        mFloatingView = LayoutInflater.from(this).inflate(R.layout.floating_widget_layout, null);

        //Add the view to the window.
        final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.TYPE_PHONE,
                WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
                PixelFormat.TRANSLUCENT);

        //Specify the view position
        params.gravity = Gravity.TOP | Gravity.START;        //Initially view will be added to top-left corner
        params.x = 0;
        params.y = 100;

        //Add the view to the window
        mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
        mWindowManager.addView(mFloatingView, params);

它几乎是好的,但有一个问题.当我从服务创建叠加时,系统后退按钮不起作用.如果我使用FLAG_NOT_FOCUSABLE系统按钮; 家庭,最近和后面的工作如预期.我在SO做了一些研究,发现这是一个安全问题,所以我开始寻找替代解决方案,然后发现这改变了我的代码

// Wrapper for intercepting System/Hardware key events …

我正在尝试使用Firebase存储和检索图像.存储图像时可以,但我无法在ImageView中显示它.它不会出错,所以我无法理解错误在哪里.

public class MainActivity extends AppCompatActivity {

private Button btnSelectImage;
private ImageView mImageView;

private StorageReference mStorage;

private static final int CAMERA_REQUEST_CODE = 1 ;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btnSelectImage = (Button) findViewById(R.id.btn_image);
    mImageView = (ImageView) findViewById(R.id.imageView);

    //Get instance
    mStorage = FirebaseStorage.getInstance().getReference();

    btnSelectImage.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(intent, CAMERA_REQUEST_CODE);

        }
    });

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if(requestCode==CAMERA_REQUEST_CODE && resultCode==RESULT_OK){ …

我正在使用paging3并且有两个不同的分页源。问题是Coroutine Scope只发出第一个分页流

在ViewModel我有两个分页流程

val pagingFlow1 = Pager(PagingConfig(pageSize = 50, prefetchDistance = 1)) {
    pagingSource
}.flow.cachedIn(viewModelScope)

val pagingFlow2 = Pager(PagingConfig(pageSize = 50, prefetchDistance = 1)) {
    pagingSource2
}.flow.cachedIn(viewModelScope)

在活动中收集它们

    lifecycleScope.launch(Dispatchers.IO) {
        viewModel.pagingFlow1.collectLatest { pagingData ->
            pagingAdapter.submitData(pagingData)
        }
        viewModel.pagingFlow2.collectLatest { pagingData ->
            pagingAdapter2.submitData(pagingData)
        }
    }

但lifecycleScope只能发出，pagingFlow1换句话说，分页只能在第一个 recyclerView 中起作用。

当我更改订单时，这次仅适用于pagingFlow2

    lifecycleScope.launch(Dispatchers.IO) {
        viewModel.pagingFlow2.collectLatest { pagingData ->
            pagingAdapter.submitData(pagingData)
        }
        viewModel.pagingFlow1.collectLatest { pagingData ->
            pagingAdapter2.submitData(pagingData)
        }
    }

为了确保我用基本流程对其进行了测试并正常工作

// Flows in ViewModel
val testFlow1 …

我正在使用分页 3，除了初始加载状态外，一切正常。我正在添加withLoadStateFooter但它在第一次调用时从不显示加载状态

这是我的实现

负载状态适配器

class LoadStateAdapter (
    private val retry: () -> Unit
): LoadStateAdapter<LoadStateViewHolder>() {

    override fun onBindViewHolder(holder: LoadStateViewHolder, loadState: LoadState) {
        holder.bindTo(loadState)
    }

    override fun onCreateViewHolder(
        parent: ViewGroup,
        loadState: LoadState
    ): LoadStateViewHolder {
        return LoadStateViewHolder.create(parent, retry)
    }
}

加载状态视图持有者

class LoadStateViewHolder(
    view : View,
    private val retryCallback: () -> Unit
) : RecyclerView.ViewHolder(view) {

    private val progressBar = view.findViewById<ProgressBar>(R.id.progress_bar)
    private val errorMsg = view.findViewById<TextView>(R.id.error_msg)
    private val btnRetry = view.findViewById<Button>(R.id.retry_button)
        .also {
            it.setOnClickListener { retryCallback() }
        } …

我有基本的RecyclerView项目与TextView和CheckBox.但是当我点击CheckBox时,它不起作用.当我长时间按下时,它更加令人惊叹.

我做了一个调查,结果发现android:descendantFocusability="blocksDescendants",android:clickable="false",android:focusable="false",android:longClickable="false"但他们并没有帮助我

这是我的RecyclerView项目布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:descendantFocusability="blocksDescendants">

    <TextView
        android:id="@+id/item_text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="TextView"
        android:paddingTop="10dp"
        android:paddingBottom="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginStart="10dp"
        android:textColor="#000000"/>

    <android.support.v7.widget.AppCompatCheckBox
        android:id="@+id/item_checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="10dp"
        android:layout_marginEnd="10dp"
        app:buttonTint="@color/colorAccent"
        android:focusable="false"
        android:focusableInTouchMode="false"/>

</LinearLayout>

这是我的Adapter类

public class FilterTypeAdapter extends RecyclerView.Adapter<FilterTypeAdapter.MyViewHolder> {

    private ArrayList<String> mData;
    private Context mContext;

    public FilterTypeAdapter() {
    }

    public FilterTypeAdapter(Context mContext, ArrayList<String> mData) {
        this.mContext = mContext;
        this.mData = mData;
    }


    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int i) { …