[英]How do I change a button with onclick in android?
我有這個按鈕,當我從
從state1到state2 ,反之亦然。
心臟是2個不同的可繪制對象(@ drawable / ic_fav_dish_color和@ drawable / ic_fav_dish_grey),文本是2個不同的字符串(@ string / dish_faved和@ string / dish_not_faved)
我用該代碼在xml中創建了按鈕:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/fav_dish_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawableLeft="@drawable/ic_fav_dish_color"
android:gravity="start|center_vertical"
android:text="@string/dish_faved"
android:textAlignment="center"
android:layout_margin="8dp"/>
</LinearLayout>
您可以使用它,您應該有兩個圖像,一個是填充圖像,另一個不是
final Button btn = (Button)(findViewById(R.id.fav_dish_button));
final Drawable drawable = getResources().getDrawable(R.drawable.your_fill_heart_image_name);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
btn.setCompoundDrawablesWithIntrinsicBounds(drawable,null,null,null);
}
});
您應該在按鈕上創建一個點擊監聽器,如下所示:
Button mButton=(Button)findViewById(R.id.fav_dish_button);
mButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mButton.setText(getResources().getString(R.string.dish_not_faved););
mButton.setBackgroundResource(R.drawable.ic_fav_dish_grey);
}
});
更新:
如果想向左更改可繪制區域,請嘗試以下代碼:
// Left, top, right, bottom drawables
Drawable[] drawables = mButton.getCompoundDrawables();
// get left drawable.
Drawable leftCompoundDrawable = drawables[0];
// get desired drawable.
Drawable img = getContext().getResources().getDrawable(R.drawable.ic_fav_dish_grey);
// set image size (don't change the size values)
img.setBounds(leftCompoundDrawable.getBounds());
// set new drawable
mButton.setCompoundDrawables(img, null, null, null);
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