如何通过重用一个布局动态创建一个android表？

Question

我正在制作一个应用程序来将小型数据库的内容显示为动态创建的表。我使用 init() 函数创建表 onCreate 并希望它随后填充数据。由于第一行或标题行是静态的，我决定硬编码该行，然后通过数据库循环创建其余行。问题是当我尝试运行它时它会抛出一个 IndexOutOfBoundsException 。我认为这与我用来回收布局的 removeView() 调用有关，但真的不确定。谁能向我解释我做错了什么？

初始化函数：

//Initiates the table
public void init(){

    //This part defines the layout to be used for creating new rows
    TableLayout ll = (TableLayout) findViewById(R.id.tableLayout);
    TableRow row= new TableRow(this);
    TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT);
    row.setLayoutParams(lp);
    TextView tdate = new TextView(this);
    TextView tweight = new TextView(this);

    //This generates the caption row
    tdate.setText("Weight");
    tdate.setPadding(3, 3, 3, 3);
    tweight.setText("Date");
    tweight.setPadding(3, 3, 3, 3);
    row.addView(tdate);
    row.addView(tweight);
    ll.addView(row,0);

    //This loop adds the database content to the table (using hardcoded values here for demonstration)
    for (int i = 1; i < 3; i++) {
        ((ViewGroup)tdate.getParent()).removeView(tdate);
        ((ViewGroup)tweight.getParent()).removeView(tweight);
        ((ViewGroup)row.getParent()).removeView(row);

        tdate.setText("20.20.2020");
        tdate.setPadding(3, 3, 3, 3);
        tweight.setText("89");
        tweight.setPadding(3, 3, 3, 3);
        row.addView(tdate);
        row.addView(tweight);
        ll.addView(row,i);
    }
}

Logcat：

07-03 11:00:34.903  30276-30276/net.sanctum.adhominem.sanctum E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: net.sanctum.adhominem.sanctum, PID: 30276
java.lang.RuntimeException: Unable to start activity ComponentInfo{net.sanctum.adhominem.sanctum/net.sanctum.adhominem.sanctum.Log}: java.lang.IndexOutOfBoundsException: index=1 count=0
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2329)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
        at android.app.ActivityThread.access$900(ActivityThread.java:147)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)
 Caused by: java.lang.IndexOutOfBoundsException: index=1 count=0
        at android.view.ViewGroup.addInArray(ViewGroup.java:3971)
        at android.view.ViewGroup.addViewInner(ViewGroup.java:3902)
        at android.view.ViewGroup.addView(ViewGroup.java:3733)
        at android.widget.TableLayout.addView(TableLayout.java:429)
        at android.view.ViewGroup.addView(ViewGroup.java:3678)
        at android.widget.TableLayout.addView(TableLayout.java:411)
        at net.sanctum.adhominem.sanctum.Log.init(Log.java:77)
        at net.sanctum.adhominem.sanctum.Log.onCreate(Log.java:20)
        at android.app.Activity.performCreate(Activity.java:5933)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282)

            

at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
            at android.app.ActivityThread.access$900(ActivityThread.java:147)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)

Answer 1

用这个，

//Initiates the table
public void init(){

    //This part defines the layout to be used for creating new rows
    TableLayout ll = (TableLayout) findViewById(R.id.table_layout);
    TableRow row= new TableRow(this);
    TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT);
    row.setLayoutParams(lp);
    TextView tdate = new TextView(this);
    TextView tweight = new TextView(this);

    //This generates the caption row
    tdate.setText("Weight");
    tdate.setPadding(3, 3, 3, 3);
    tweight.setText("Date");
    tweight.setPadding(3, 3, 3, 3);
    row.addView(tdate);
    row.addView(tweight);
    ll.addView(row,0);

    //This loop adds the database content to the table (using hardcoded values here for demonstration)
    for (int i = 1; i < 3; i++) {

        row= new TableRow(this);
        lp = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT);
        row.setLayoutParams(lp);
        tdate = new TextView(this);
        tweight = new TextView(this);
        tdate.setText("20.20.2020");
        tdate.setPadding(3, 3, 3, 3);
        tweight.setText("89");
        tweight.setPadding(3, 3, 3, 3);
        row.addView(tdate);
        row.addView(tweight);
        ll.addView(row,i);
    }
}