我在互联网上看到了很多这样的问题,但所有的解决方案都对我无效...
所以问题来了。我想要一个按钮,它的宽度是屏幕的50%(这个没问题)。
但现在我想让它的高度与宽度相同。
不知怎么回事,下面的代码并没有实现这个功能:
Button button1 = (Button) findViewById(R.id.button1);
int btnSize = button1.getLayoutParams().width;
button1.setLayoutParams(new LinearLayout.LayoutParams(btnSize, btnSize));
以下是代码:
Activity1.java:
package nl.jesse.project1;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.LinearLayout;
public class Activity1 extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity1);
Button button1 = (Button) findViewById(R.id.button1);
int btnSize = button1.getLayoutParams().width;
System.out.println(btnSize);
//button1.setLayoutParams(new LinearLayout.LayoutParams(btnSize, btnSize));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_activity1, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Activity_activity1.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Activity1"
android:weightSum="1.0" >
<Button
android:layout_height="wrap_content"
android:layout_weight=".5"
android:layout_width="0dip"
android:text="@string/button1"
android:id="@+id/button1" />
</LinearLayout>
我已经尝试过这些方法,但没有成功。
那么我做错了什么?