最小バージョンが 2.2 の Android アプリに取り組んでいます。Android サポート v7 グリッドレイアウトも使用しています。Java コードで作成し、線形レイアウトに挿入しようとしています。ただし、それを行うとクラッシュします。
GridLayout gl = new GridLayout(this);
LinearLayout.LayoutParams gridMargin = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
gl.setLayoutParams(gridMargin);
gl.setColumnCount(1);
gl.setRowCount(1);
TextView number = new TextView(this);
number.setPadding(10, 10, 10, 10);
number.setText(Integer.toString(1, 10));
number.setTextAppearance(this, R.style.studentGrid);
number.setBackgroundResource(R.drawable.grid_cell);
LinearLayout.LayoutParams numberMargin = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
number.setLayoutParams(numberMargin);
gl.addView(number);
studentContainer.addView(gl);
子要素を追加しなければ、クラッシュしません。ここで何が悪いのか誰か知っていますか？
ありがとう。
10-22 20:33:06.160: E/AndroidRuntime(25131): FATAL EXCEPTION: main
10-22 20:33:06.160: E/AndroidRuntime(25131): java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.support.v7.widget.GridLayout$LayoutParams
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.support.v7.widget.GridLayout.computeLayoutParamsHashCode(GridLayout.java:872)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.support.v7.widget.GridLayout.checkForLayoutParamsModification(GridLayout.java:879)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.support.v7.widget.GridLayout.onMeasure(GridLayout.java:927)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5108)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1396)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5108)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1396)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.measureVertical(LinearLayout.java:681)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.HorizontalScrollView.measureChildWithMargins(HorizontalScrollView.java:1475)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.HorizontalScrollView.onMeasure(HorizontalScrollView.java:361)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1466)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.ScrollView.onMeasure(ScrollView.java:388)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.measureVertical(LinearLayout.java:833)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5108)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.measureVertical(LinearLayout.java:833)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5108)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
10-22 20:33:06.160: E/AndroidRuntime(25131): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2397)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.View.measure(View.java:15460)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1987)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1228)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1401)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1121)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4598)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.Choreographer.doFrame(Choreographer.java:525)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.os.Handler.handleCallback(Handler.java:615)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.os.Handler.dispatchMessage(Handler.java:92)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.os.Looper.loop(Looper.java:137)
10-22 20:33:06.160: E/AndroidRuntime(25131): at android.app.ActivityThread.main(ActivityThread.java:4950)
10-22 20:33:06.160: E/AndroidRuntime(25131): at java.lang.reflect.Method.invokeNative(Native Method)
10-22 20:33:06.160: E/AndroidRuntime(25131): at java.lang.reflect.Method.invoke(Method.java:511)
10-22 20:33:06.160: E/AndroidRuntime(25131): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
10-22 20:33:06.160: E/AndroidRuntime(25131): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
10-22 20:33:06.160: E/AndroidRuntime(25131): at dalvik.system.NativeStart.main(Native Method)