所以我有一個12×9的「按鈕」網格稱爲「瓷磚」。 Tile.java擴展了小部件「Button」。「setView必須被調用」 - 自定義類擴展按鈕
我現在有一個問題,雖然我試圖讓按鈕顯示一個召回推按鈕的ID的吐司。
網格動態添加,我希望它保持這種方式。
下面的代碼從GameBoardActivity.java:
這使得「磚」的12x9網格,並增加了一個監聽每個。
public void gridRowButtons(int iterations){
final Tile[] gridSpaces = new Tile[12];
LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f);
for (int i = 0; i < 12; i++) {
String idString = String.valueOf(aToI[iterations]) + String.valueOf(i + 1);
final int id = getResources().getIdentifier(idString, "id", getPackageName());
gridSpaces[i] = new Tile(getApplicationContext());
gridSpaces[i].setText("");
gridSpaces[i].setHeight(40);
gridSpaces[i].setWidth(40);
gridSpaces[i].setLayoutParams(buttonParams);
gridSpaces[i].setId(id);
OnClickListener showID = new OnClickListener(){
public void onClick(View view){
TextView text = (TextView) findViewById(R.id.tileIDText);
String tileID = getApplicationContext().getResources().getResourceEntryName(id);
text.setText(tileID);
Tile clickedTile = (Tile) findViewById(id);
clickedTile.tileClick(0, tileID);
}
};
gridSpaces[i].setOnClickListener(showID);
}
LinearLayout buttonRow = new LinearLayout(getApplicationContext());
buttonRow.setOrientation(LinearLayout.HORIZONTAL);
buttonRow.setLayoutParams(buttonParams);
LinearLayout boardSpace = (LinearLayout) this.findViewById(R.id.boardLayout);
for (int i = 0; i < gridSpaces.length; i++) {
buttonRow.addView(gridSpaces[i]);
}
boardSpace.addView(buttonRow);
}
,這裏是上面提到的tileClick方法:
public void tileClick(int action, String tileID) {
switch(action) {
case 1 :
//action 1
case 2 :
//action 2
default :
Context context = getContext();
Toast toast = new Toast(context);
Toast.makeText(context, tileID, Toast.LENGTH_SHORT);
toast.show();
}
}
的logcat中顯示以下內容:
02-22 20:45:14.623: E/AndroidRuntime(7868): FATAL EXCEPTION: main
02-22 20:45:14.623: E/AndroidRuntime(7868): java.lang.RuntimeException: setView must have been called
02-22 20:45:14.623: E/AndroidRuntime(7868): at android.widget.Toast.show(Toast.java:103)
02-22 20:45:14.623: E/AndroidRuntime(7868): at com.jneal.ecquire.Tile.tileClick(Tile.java:51)
02-22 20:45:14.623: E/AndroidRuntime(7868): at com.jneal.ecquire.GameBoardActivity$1.onClick(GameBoardActivity.java:55)
02-22 20:45:14.623: E/AndroidRuntime(7868): at android.view.View.performClick(View.java:3627)
02-22 20:45:14.623: E/AndroidRuntime(7868): at android.view.View$PerformClick.run(View.java:14329)
02-22 20:45:14.623: E/AndroidRuntime(7868): at android.os.Handler.handleCallback(Handler.java:605)
02-22 20:45:14.623: E/AndroidRuntime(7868): at android.os.Handler.dispatchMessage(Handler.java:92)
02-22 20:45:14.623: E/AndroidRuntime(7868): at android.os.Looper.loop(Looper.java:137)
02-22 20:45:14.623: E/AndroidRuntime(7868): at android.app.ActivityThread.main(ActivityThread.java:4511)
02-22 20:45:14.623: E/AndroidRuntime(7868): at java.lang.reflect.Method.invokeNative(Native Method)
02-22 20:45:14.623: E/AndroidRuntime(7868): at java.lang.reflect.Method.invoke(Method.java:511)
02-22 20:45:14.623: E/AndroidRuntime(7868): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:976)
02-22 20:45:14.623: E/AndroidRuntime(7868): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:743)
02-22 20:45:14.623: E/AndroidRuntime(7868): at dalvik.system.NativeStart.main(Native Method)
這是怎麼回事?我有幾乎完全相同的代碼,用於在我的MainActivity.java中顯示敬酒,並且執行沒有問題。 是因爲我擴展了Button,它不知道視圖是什麼? 另外,由於某些原因,Eclipse不會讓我添加setView()。我相信我在這裏有封裝問題,但我對它們是什麼感到困惑。 感謝您的幫助提前。 JRad