那些遇到过的问题

以编程方式创建布局资源 Kotlin Android

Jr *_*mnz 5 android android-layout kotlin android-studio

我在尝试完全以编程方式制作此布局时遇到问题，每次进程运行结束时都没有成功并且应用程序崩溃。

我试图以编程方式创建的 XML 部分是：

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/idImagenPlay0"
            android:layout_width="62dp"
            android:layout_height="54dp"
            android:layout_marginRight="10dp"
            android:layout_marginTop="15dp"
            android:src="@drawable/ic_action_play" />
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:id="@+id/idNombre0"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Description"
                android:textSize="25sp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/idInfo0"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="15dp"
                android:layout_marginRight="10dp"
                android:text="Title" />

        </LinearLayout>

        <ImageView
            android:id="@+id/idImagenShare0"
            android:layout_width="54dp"
            android:layout_height="48dp"
            android:layout_alignParentRight="true"
            android:layout_marginRight="10dp"
            android:layout_marginTop="15dp"
            android:src="@drawable/ic_action_share" />
        </RelativeLayout>
    </LinearLayout>
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我正在尝试使用以下 kotlin 代码重新创建它：

fun createXmlElement(title:String,description:String){
    val parent = LinearLayout(this)
    parent.layoutParams = LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    parent.orientation = LinearLayout.HORIZONTAL

    //children of parent linearlayout
    val iv = ImageView(this)
    val lp = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lp.setMargins(0, 11, 7, 0)
    iv.setLayoutParams(lp)
    iv.setImageResource(R.drawable.ic_action_play)
    iv.getLayoutParams().height = 40;
    iv.getLayoutParams().width = 46;

    parent.addView(iv); // lo agregamos al layout

    val relativeP = RelativeLayout(this)
    relativeP.layoutParams = RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
            RelativeLayout.LayoutParams.MATCH_PARENT)

    val linearCH = LinearLayout(this)
    linearCH.layoutParams = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)
    // TextView1
    val tv1 = TextView(this)
    val lptv1 = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lptv1.setMargins(0, 7, 0, 0)

    tv1.setLayoutParams(lptv1)
    tv1.setText(title) // nombre de la musica
    tv1.setTextSize(TypedValue.COMPLEX_UNIT_SP,25F)
    tv1.setTypeface(null, Typeface.BOLD);

    // TextView2
    val tv2 = TextView(this)
    val lptv2 = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lptv2.setMargins(0, 11, 7, 0)

    tv2.setLayoutParams(lptv1)
    tv2.setText(description) // Descripcion de la musica
    tv2.setTextSize(TypedValue.COMPLEX_UNIT_SP, 25F)
    tv2.setTypeface(null, Typeface.BOLD);

    linearCH.addView(tv1)
    linearCH.addView(tv2)

    relativeP.addView(linearCH)

    // last ImageView
    val iv2 = ImageView(this)
    val lpiv2 = RelativeLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lpiv2.setMargins(0, 11, 7, 0)
    lpiv2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT)
    iv2.setLayoutParams(lpiv2)
    iv2.setImageResource(R.drawable.ic_action_share)
    iv2.getLayoutParams().height = 40;
    iv2.getLayoutParams().width = 46;


    parent.addView(iv)
    parent.addView(relativeP)
    parent.addView(iv2)


}
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这是我在 logcat 中遇到的错误

04-27 10:51:01.224 6973-6973/com.klystru.app.appE/AndroidRuntime: FATAL EXCEPTION: main
Process: com.klystru.app.app, PID: 6973
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.klystru.app.app/com.klystru.app.app.MainActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2583)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2665)
    at android.app.ActivityThread.-wrap11(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1499)
    at android.os.Handler.dispatchMessage(Handler.java:111)
    at android.os.Looper.loop(Looper.java:207)
    at android.app.ActivityThread.main(ActivityThread.java:5765)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
 Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
    at android.view.ViewGroup.addViewInner(ViewGroup.java:4453)
    at android.view.ViewGroup.addView(ViewGroup.java:4281)
    at android.view.ViewGroup.addView(ViewGroup.java:4222)
    at android.view.ViewGroup.addView(ViewGroup.java:4195)
    at com.klystru.app.app.MainActivity.createXmlElement(MainActivity.kt:284)
    at com.klystru.app.app.MainActivity.onCreate(MainActivity.kt:121)
    at android.app.Activity.performCreate(Activity.java:6309)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1113)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2530)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2665) 
    at android.app.ActivityThread.-wrap11(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1499) 
    at android.os.Handler.dispatchMessage(Handler.java:111) 
    at android.os.Looper.loop(Looper.java:207) 
    at android.app.ActivityThread.main(ActivityThread.java:5765) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) 
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我仍在研究它可能是什么，我怀疑它可能是错误的 LayoutParams，但并不清楚如何以编程方式正确设置这些资源。

提前致谢。

PD：如果我发现了什么我会更新。

任何帮助将非常受欢迎！

更新 1.0：

好的，按照 logcat，我必须打电话给removeView孩子的父母，但我不知道具体在哪里。我正在寻找那个。

Jr *_*mnz 6

好的解决方案如下：

只需要在添加孩子之前在所有父母上添加 removeAllView

protected fun createXmlElement(title:String,description:String){
    val parent = LinearLayout(this)
    parent.layoutParams = LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    parent.orientation = LinearLayout.HORIZONTAL



    //children of parent linearlayout
    val iv = ImageView(this)
    val lp = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lp.setMargins(0, 11, 7, 0)
    iv.setLayoutParams(lp)
    iv.setImageResource(R.drawable.ic_action_play)
    iv.getLayoutParams().height = 40
    iv.getLayoutParams().width = 46


    parent.addView(iv); // lo agregamos al layout

    val relativeP = RelativeLayout(this)
    relativeP.layoutParams = RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
            RelativeLayout.LayoutParams.MATCH_PARENT)

    val linearCH = LinearLayout(this)
    linearCH.layoutParams = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)
    // TextView1
    val tv1 = TextView(this)
    val lptv1 = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lptv1.setMargins(0, 7, 0, 0)

    tv1.setLayoutParams(lptv1)
    tv1.setText(title) // title
    tv1.setTextSize(TypedValue.COMPLEX_UNIT_SP,25F)
    tv1.setTypeface(null, Typeface.BOLD)

    // TextView2
    val tv2 = TextView(this)
    val lptv2 = LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lptv2.setMargins(0, 11, 7, 0)

    tv2.setLayoutParams(lptv1)
    tv2.setText(description) // description
    tv2.setTextSize(TypedValue.COMPLEX_UNIT_SP, 25F)
    tv2.setTypeface(null, Typeface.BOLD)

    linearCH.removeAllViews()
    linearCH.addView(tv1)
    linearCH.addView(tv2)

    relativeP.removeAllViews()
    relativeP.addView(linearCH)

    // last ImageView
    val iv2 = ImageView(this)
    val lpiv2 = RelativeLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT)

    lpiv2.setMargins(0, 11, 7, 0)
    lpiv2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT)
    iv2.setLayoutParams(lpiv2)
    iv2.setImageResource(R.drawable.ic_action_share)
    iv2.getLayoutParams().height = 40
    iv2.getLayoutParams().width = 46


    parent.removeAllViews()
    parent.addView(iv)
    parent.addView(relativeP)
    parent.addView(iv2)

    val finalParent = this.findViewById(R.id.contenedor) as ViewGroup

    finalParent.addView(parent)
}
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谢谢 Nsion，logcat 上的错误指向了我正确的方向！

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