在Android上动态更改线性布局宽度或高度

我试图动态改变线性布局或任何其他小部件的宽度或高度，但抛出异常

我的布局是：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/abc"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView   
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="ghghjkgj ghjg hjgj ghj g hjgjgh jhg "
    />
</LinearLayout>

引发以下异常：

E/AndroidRuntime(16052): java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams
E/AndroidRuntime(16052):    at android.widget.FrameLayout.onLayout(FrameLayout.java:288)
E/AndroidRuntime(16052):    at android.view.View.layout(View.java:7035)
E/AndroidRuntime(16052):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
E/AndroidRuntime(16052):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
E/AndroidRuntime(16052):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
E/AndroidRuntime(16052):    at android.view.View.layout(View.java:7035)
E/AndroidRuntime(16052):    at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
E/AndroidRuntime(16052):    at android.view.View.layout(View.java:7035)
E/AndroidRuntime(16052):    at android.view.ViewRoot.performTraversals(ViewRoot.java:1045)
E/AndroidRuntime(16052):    at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
E/AndroidRuntime(16052):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(16052):    at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(16052):    at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime(16052):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(16052):    at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(16052):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(16052):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime(16052):    at dalvik.system.NativeStart.main(Native Method)

---

那么如何动态更改尺寸呢？

这里的问题是，当您设置布局参数时，类型需要是父级的类型，在这种情况下，类型是FrameLayout。您需要这样做：

ll.setLayoutParams(new FrameLayout.LayoutParams(30,60));

检查这个-

---

这也适用于事件处理程序。

执行任务的简单方法：

setContentView(R.id.main);    
LinearLayout layout= (LinearLayout) findViewById(R.id.left);
int width=60;
int height=60;
LinearLayout.LayoutParams parms = new LinearLayout.LayoutParams(width,height);
layout.setLayoutParams(parms);

另一种方法是，如果您想给出屏幕的高度和宽度，请使用以下代码：

setContentView(R.id.main);    
Display display = getWindowManager().getDefaultDisplay();
LinearLayout layout= (LinearLayout) findViewById(R.id.left);
int width=display.getWidth();
int height=display.getHeight();
LinearLayout.LayoutParams parms = new inearLayout.LayoutParams(width,height);
layout.setLayoutParams(parms);

---

希望对您使用full。

您可以在utils类中使用此方法动态设置高度和宽度。

 public void setWidthAndHeight(Context context,RelativeLayout view,int width, int height) {
                width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, width, context.getResources().getDisplayMetrics());//used to convert you width integer value same as dp
                height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, height, context.getResources().getDisplayMetrics());
               //note : if your layout is LinearLayout then use LinearLayout.LayoutParam
                view.setLayoutParams(new RelativeLayout.LayoutParams(width, height));
         }

---

非常感谢…….这对我很有帮助，但我如何识别linearlayout的父级。它是有效的，但应该记住的是视图应该有父级，否则getLayoutParams（）将返回null px，但您可以将其转换为dp

setContentView(R.id.main);    
Display display = getWindowManager().getDefaultDisplay();
LinearLayout layout= (LinearLayout) findViewById(R.id.left);
int width=display.getWidth();
int height=display.getHeight();
LinearLayout.LayoutParams parms = new inearLayout.LayoutParams(width,height);
layout.setLayoutParams(parms);

 public void setWidthAndHeight(Context context,RelativeLayout view,int width, int height) {
                width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, width, context.getResources().getDisplayMetrics());//used to convert you width integer value same as dp
                height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, height, context.getResources().getDisplayMetrics());
               //note : if your layout is LinearLayout then use LinearLayout.LayoutParam
                view.setLayoutParams(new RelativeLayout.LayoutParams(width, height));
         }