[英]Initializing TableLayout in XML and programmatically filling it - Android (java)
我正在嘗試以XML初始化TableLayout,然后以編程方式將其填充。 這是我的XML,java和LogCat輸出。
Highscores.java
public class Highscores extends Activity {
TableLayout table;
TableRow rowHeader, row1, row2, row3, row4, row5, row6, row7, row8, row9, row10;
TextView rank, percentage, score;
Button btn1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.highscoresmain);
TableLayout table = (TableLayout)findViewById(R.id.tableLayout);
TextView rank = (TextView)findViewById(R.id.rank);
rank.setText("RANK");
TextView percentage = (TextView)findViewById(R.id.percentage);
percentage.setText("PERCENTAGE");
TextView score = (TextView)findViewById(R.id.score);
score.setText("SCORE");
TableRow rowHeader = (TableRow)findViewById(R.id.rowHeader);
rowHeader.addView(rank); //Line 39
rowHeader.addView(percentage);
rowHeader.addView(score);
Button btn1 = (Button)findViewById(R.id.homeBtn);
table.addView(rowHeader, new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
btn1.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(Highscores.this, MainMenu.class);
startActivity(intent);
}
});
}
}
highscoresmain.xml
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id = "@+id/tableLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:padding="5dp">
<TableRow
android:layout_height="wrap_content"
android:id="@+id/rowHeader">
<TextView
android:id="@+id/rank"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/percentage"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/score"
android:layout_height="wrap_content" />
</TableRow>
</TableLayout>
logcat的
12-19 06:03:36.960: E/AndroidRuntime(20130): FATAL EXCEPTION: main
12-19 06:03:36.960: E/AndroidRuntime(20130): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.Highscores}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.ActivityThread.access$600(ActivityThread.java:130)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.os.Handler.dispatchMessage(Handler.java:99)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.os.Looper.loop(Looper.java:137)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.ActivityThread.main(ActivityThread.java:4745)
12-19 06:03:36.960: E/AndroidRuntime(20130): at java.lang.reflect.Method.invokeNative(Native Method)
12-19 06:03:36.960: E/AndroidRuntime(20130): at java.lang.reflect.Method.invoke(Method.java:511)
12-19 06:03:36.960: E/AndroidRuntime(20130): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-19 06:03:36.960: E/AndroidRuntime(20130): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-19 06:03:36.960: E/AndroidRuntime(20130): at dalvik.system.NativeStart.main(Native Method)
12-19 06:03:36.960: E/AndroidRuntime(20130): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.view.ViewGroup.addViewInner(ViewGroup.java:3378)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.view.ViewGroup.addView(ViewGroup.java:3249)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.view.ViewGroup.addView(ViewGroup.java:3194)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.view.ViewGroup.addView(ViewGroup.java:3170)
12-19 06:03:36.960: E/AndroidRuntime(20130): at com.example.test.Highscores.onCreate(Highscores.java:39)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.Activity.performCreate(Activity.java:5008)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
12-19 06:03:36.960: E/AndroidRuntime(20130): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
12-19 06:03:36.960: E/AndroidRuntime(20130): ... 11 more
我想要的是一個簡單的3列表,其中第1行的標題為“ RANK”,“ PERCENTAGE”和“ SCORE”。 稍后,我將再從SQLite數據庫中提取10行,但之后再解決。
您的xml文件將被編輯;
我正在嘗試以XML初始化TableLayout,然后以編程方式將其填充。 這是我的XML,java和LogCat輸出。
highscoresmain.xml
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id = "@+id/tableLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:padding="5dp">
</TableLayout>
高分課程內容;
public class Highscores extends Activity {
TableLayout table;
TableRow rowHeader, row1, row2, row3, row4, row5, row6, row7, row8, row9, row10;
TextView rank, percentage, score;
Button btn1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.highscoresmain);
TableLayout table = (TableLayout)findViewById(R.id.tableLayout);
TextView rank = new TextView(this);
rank.setText("RANK");
TextView percentage = new TextView(this);
percentage.setText("PERCENTAGE");
TextView score = new TextView(this);
score.setText("SCORE");
TableRow rowHeader = new TableRow(this);
rowHeader.addView(rank); //Line 39
rowHeader.addView(percentage);
rowHeader.addView(score);
Button btn1 = (Button)findViewById(R.id.homeBtn);
table.addView(rowHeader);
btn1.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(Highscores.this, MainMenu.class);
startActivity(intent);
}
});
}
}
您不需要以下代碼:
TableRow rowHeader = (TableRow)findViewById(R.id.rowHeader);
rowHeader.addView(rank); //Line 39
rowHeader.addView(percentage);
rowHeader.addView(score);
table.addView(rowHeader, new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
由於它們已經在布局中定義。
答案在您的logcat
:
java.lang.RuntimeException:無法啟動活動ComponentInfo {com.example.test / com.example.test.Highscores}:java.lang.IllegalStateException:指定的子代已經有一個父代。 您必須先在孩子的父母上調用removeView()。
TextView
已經在TableRow
,如果您要以編程方式填充它,只需刪除TableLayout
所有子項,然后在代碼中創建它們,然后像剛才那樣將它們添加到Activity
的onCreate
中即可。
祝好運!
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