Android 在代码中设置图像按钮的高度和宽度
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set imagebutton height and width in code
提问by imin
this is my code
这是我的代码
ImageButton btnPlayVideo = (ImageButton) findViewById(R.id.btnPlayVideo);
btnPlayVideo.setBackgroundResource(R.drawable.play_icon_grey);
btnPlayVideo.setAdjustViewBounds(true);
btnPlayVideo.setMaxHeight(10);
btnPlayVideo.setMaxWidth(10);
and in my xml
在我的 xml 中
<ImageButton
android:id="@+id/btnPlayVideo"
android:layout_width="90dp"
android:layout_height="90dp"
android:background="@android:color/transparent"
android:layout_span="2" />
but it seems the setmaxheight and layout_height and width doesn't even work. so how do i set the imagebutton's dimension?
但似乎 setmaxheight 和 layout_height 和宽度甚至不起作用。那么如何设置图像按钮的尺寸？
回答by Vipul Shah
You will need to use android:scaleTypeto have it resize to fit.
您将需要使用android:scaleType它来调整大小以适应。
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher"
android:scaleType="fitXY" />
Which produces following output.
产生以下输出。
回答by Fenix Voltres
You can do it from code via
您可以通过代码通过
android.view.ViewGroup.LayoutParams params = btnPlayVideo.getLayoutParams();
params.height = myHeight;
params.width = myWidth;
btnPlayVideo.setLayoutParams(params);
, but probably your problem lays not in the code, but in layout - I see you are using android:layout_span="2"- does that mean btnPlayVideois in TableLayout? If so, you must regulate this TableLayout's dimensions, because its children will always have fill_parentwidth and heights.
，但可能你的问题不在于代码，而在于布局——我看到你正在使用android:layout_span="2"——这是否意味着btnPlayVideo在TableLayout？如果是这样，您必须调节 thisTableLayout的尺寸，因为它的子项将始终具有fill_parent宽度和高度。
回答by Bonne Bogaert
I used metrics:
我使用了指标：
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
btnPlayVideo.setMinimumHeight(metrics.heightPixels / (amount));
btnPlayVideo.setMinimumWidth(metrics.widthPixels/ (amount));
