Question

我的课程扩展了baseActivity，除了文本视图上的简单onClick外，一切正常： - |

TextView labelName_view = (TextView) findViewById(R.id.labelName);
labelName_view.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
        // animazione automatica al click
        LinearLayout contenitore_cibo_l=(LinearLayout) findViewById(R.id.bottom_container);
        LayoutParams lp = (LayoutParams) contenitore_cibo_l.getLayoutParams();
        System.out.println(lp.topMargin);
        //contenitore_cibo_l.startAnimation(makeAnimation_ordini(400, 25));
    }
});

当我点击时，它会崩溃：

05-27 12:30:22.722: E/AndroidRuntime(2932): FATAL EXCEPTION: main
05-27 12:30:22.722: E/AndroidRuntime(2932): java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.app.ActionBar$LayoutParams
05-27 12:30:22.722: E/AndroidRuntime(2932):     at com.web_pos.android.OrderActivity$4.onClick(OrderActivity.java:296)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at android.view.View.performClick(View.java:3511)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at android.view.View$PerformClick.run(View.java:14105)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at android.os.Handler.handleCallback(Handler.java:605)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at android.os.Looper.loop(Looper.java:137)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at android.app.ActivityThread.main(ActivityThread.java:4424)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at java.lang.reflect.Method.invokeNative(Native Method)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at java.lang.reflect.Method.invoke(Method.java:511)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-27 12:30:22.722: E/AndroidRuntime(2932):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

问题在于您使用的LayoutParams类型。从日志中可以看出您使用的是android.app.ActionBar.LayoutParams。将其更改为android.widget.RelativeLayout.LayoutParams，它应该可以顺利进行。希望它有所帮助。

Answer 2

您必须始终采用要更改布局的容器布局的布局参数，假设我想要更改线性布局中的按钮布局，因此我必须采用线性布局参数

Answer 3

您需要更正LayoutParams的import语句。

不应导入android.app.ActionBar.LayoutParams，而应导入android.widget.RelativeLayout.LayoutParams

Android，textview onclick崩溃

3 个答案: