我无法从一项活动切换到另一项，并且在清单文件中遇到问题。

huangapple
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英文:

I can't switch from one activity to another and I have a problem at the manisfest

问题

抱歉，你提供的代码和问题中包含了一些英文和代码，但我只能提供中文翻译。以下是翻译好的部分：

你说你的应用程序出现了问题，当尝试跳转到另一个活动时，应用程序崩溃了。在Logcat中，你看到了这个错误消息：android.content.ActivityNotFoundException: 无法找到显式活动类{com.example.project35cardview / com. example.proyecto35ca.MainActivitycardView}；你是否在AndroidManifest.xml中声明了此活动？

你查看了清单文件，并尝试从清单文件中调用它，但只看到了两个活动。

在MainActivitycardView代码中，你创建了一个媒体播放器数组来处理音频文件，并设置了一些按钮点击事件来控制播放和暂停。你还有一个重复按钮，用于控制是否重复播放音轨。

如果需要更多帮助，请提出具体的问题或描述你需要的帮助。

英文:

Hello friend I have a problem with my intent, I am trying to go to another activity but my application is destroyed, in the logcat I see that mesaage (android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.project35cardview / com. example.proyecto35ca.MainActivitycardView}; have you declared this activity in your AndroidManifest.xml?)
I go to the manifest and I try to call it from the manifest and only two activities appear.

logcat

  1. 2020-08-08 07:15:11.600 28853-28853/? E/yecto35cardvie: Unknown bits set in runtime_flags: 0x8000
  2. 2020-08-08 07:15:11.663 28853-28853/? E/libc: Access denied finding property "runtime.mmitest.isrunning"
  3. 2020-08-08 07:15:12.117 28853-28888/com.example.proyecto35cardview E/AwareLog: AtomicFileUtils: readFileLines file not exist: android.util.AtomicFile@1108279
  4. 2020-08-08 07:15:12.119 28853-28888/com.example.proyecto35cardview E/AwareLog: AtomicFileUtils: readFileLines file not exist: android.util.AtomicFile@e5e9bbe
  5. 2020-08-08 07:15:15.146 28853-28853/com.example.proyecto35cardview E/AndroidRuntime: FATAL EXCEPTION: main
  6.     Process: com.example.proyecto35cardview, PID: 28853
  7.     android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.proyecto35cardview/com.example.proyecto35ca.MainActivitycardView}; have you declared this activity in your AndroidManifest.xml?
  8.         at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2111)
  9.         at android.app.Instrumentation.execStartActivity(Instrumentation.java:1739)
  10.         at android.app.Activity.startActivityForResult(Activity.java:5363)
  11.         at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:676)
  12.         at android.app.Activity.startActivityForResult(Activity.java:5304)
  13.         at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:663)
  14.         at android.app.Activity.startActivity(Activity.java:5734)
  15.         at android.app.Activity.startActivity(Activity.java:5702)
  16.         at com.example.proyecto35cardview.MainActivity$onCreate$2.onClick(MainActivity.kt:22)
  17.         at android.view.View.performClick(View.java:7192)
  18.         at android.view.View.performClickInternal(View.java:7166)
  19.         at android.view.View.access$3500(View.java:824)
  20.         at android.view.View$PerformClick.run(View.java:27592)
  21.         at android.os.Handler.handleCallback(Handler.java:888)
  22.         at android.os.Handler.dispatchMessage(Handler.java:100)
  23.         at android.os.Looper.loop(Looper.java:213)
  24.         at android.app.ActivityThread.main(ActivityThread.java:8178)
  25.         at java.lang.reflect.Method.invoke(Native Method)
  26.         at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
  27.         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1101)

My code

  1.  card_view.setOnClickListener {
  2.           val intent = Intent (this,MainActivitycardView::class.java
  3.             startActivity(intent)//line 22
  4.             }

Manifest

我无法从一项活动切换到另一项，并且在清单文件中遇到问题。

The problem (I try to call MainActivity cardView and it only shows two activities)
我无法从一项活动切换到另一项，并且在清单文件中遇到问题。

MainActivitycardView

  1.  override fun onCreate(savedInstanceState: Bundle?) {
  2.         super.onCreate(savedInstanceState)
  3.         setContentView(R.layout.activity_main_activitycard_view)
  5.         //Se debe crear un vector de tipo MediaPlayer de 3 posiciones porque tengo 3 canciones
  6.         val vectoMp3 = arrayOfNulls<MediaPlayer>(3)
  7.         var repetir = 2
  8.         var position = 0
  9.         vectoMp3[0]= MediaPlayer.create(this,R.raw.race)
  10.         vectoMp3[1] = MediaPlayer.create(this,R.raw.sound)
  11.         vectoMp3[2]=MediaPlayer.create(this,R.raw.tea)
  13.         //Metodo para pausar la canción
  14.         buttonPlay.setOnClickListener {
  15.             if (vectoMp3[position]?.isPlaying!!){
  16.                 vectoMp3[position]?.pause()
  17.                 //Metodo para cambiar imagen del boton
  18.                 buttonPlay.setBackgroundResource(R.drawable.reproducir)
  19.                 Toast.makeText(this ,"Pausa", Toast.LENGTH_SHORT).show()
  20.             } else {
  21.                 vectoMp3[position]?.start()
  22.                 buttonPlay.setBackgroundResource(R.drawable.pausa)
  23.                 Toast.makeText(this ,"Play", Toast.LENGTH_SHORT).show()
  24.             }
  25.         }
  27.         //Metodo para detener una canción
  28.         buttonStop.setOnClickListener {
  29.             if (vectoMp3[position] !=null){
  30.                 vectoMp3[position]?.stop()
  31.                 //Se debe colocar los vectores para que el boton  sepa que va a pausar
  32.                 vectoMp3[0]= MediaPlayer.create(this,R.raw.race)
  33.                 vectoMp3[1] = MediaPlayer.create(this,R.raw.sound)
  34.                 vectoMp3[2]=MediaPlayer.create(this,R.raw.tea)
  35.                 position = 0
  36.                 buttonPlay.setBackgroundResource(R.drawable.reproducir)
  37.                 //Metodo para volver a la portada 1
  38.                 imageView.setBackgroundResource(R.drawable.portada1)
  39.                 Toast.makeText(this, "Stop", Toast.LENGTH_SHORT).show()
  40.             }
  41.         }
  42.         //Metodo para repetir una pista
  43.         button4.setOnClickListener {
  44.             if (repetir==1){
  45.                 button4.setBackgroundResource(R.drawable.no_repetir)
  46.                 Toast.makeText(this, "No repetor", Toast.LENGTH_SHORT).show()
  47.                 vectoMp3[position]?.isLooping  = false
  48.                 repetir = 2
  49.             } else {
  50.                 button4.setBackgroundResource(R.drawable.repetir)
  51.                 Toast.makeText(this, "Repetir", Toast.LENGTH_SHORT).show()
  52.                 vectoMp3[position]?.isLooping  = true
  53.                 repetir = 1
  54.             }
  55.         }
  57.     }
  58. }

答案1

得分: 1

请显示您的MainActivitycardView.java类的定义。希望您将其扩展如下：

  1. public class MainActivitycardView extends AppCompatActivity {
  2.     //类的主体部分
  3. }
英文:

Please show the definition of your class MainActivitycardView.java.
Hope you extended it like this :

  1. public class MainActivitycardView extends AppCompatActivity { 
  2.     //body of the class 
  3. }

huangapple
  • 本文由 发表于 2020年8月8日 20:44:24
  • 转载请务必保留本文链接：https://go.coder-hub.com/63315566.html
  • android
  • android-manifest
  • java
  • kotlin
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