Android add image to button

问题:

I want to add an image to a Button (no imagebutton, as the particular button can either contain text or an image; plus the imagebutton has the same problem), while still retaining the original android-style button. So adding android:background in the XML doesn't cut it, as that will remove the android default button with rounded corners etc. (android.R.drawable.btn_default)

Is this in any way possible?

I think one way is to make a 9patch image for the button pressed (one for up and one for down) and onTouch Action_DOWN make a layered background drawable and put that onto the button, and doing the same thing but with another 9patch for onTouch Action_UP, but I think that will decrease the performance of the application substantially, as that will require quite a lot of resource reading and layer merging for all the button clicks (and for my application, that will be quite a lot). Is what I state above correct?

EDIT: I can't declare the source of the image in the XML, because I get the images from a web service, so anything can be put on the Buttons, but it has to happen programmatically.

回答1:

This can be done using the android:drawableTop, android:drawableBottom, android:drawableLeft, android:drawableRight attributes in your layout.xml.

回答2:

     <Button
            android:layout_width="0dp"
            android:layout_weight="1"
            android:background="@drawable/home_button"
            android:drawableLeft="@android:drawable/ic_menu_edit"
            android:drawablePadding="6dp"
            android:gravity="left|center"
            android:height="60dp"
            android:padding="6dp"
            android:text="AndroidDhina"
            android:textColor="#000"
            android:textStyle="bold" />

for more info http://androiddhina.blogspot.in/2015/09/how-to-add-image-inside-button.html

回答3:

Set below Property of Button for Display Image with Text, using this property image is displaying above text.

<Button android:drawableTop="@drawable/ic_launcher"/>

回答4:

For setting Image :

btn.setBackgroundResource(R.drawable.ic_launcher);

For setting text :

btn.setText("My Button");

Code :

private Drawable buttonDrawable;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final Button btn=(Button) findViewById(R.id.button1);
    buttonDrawable=btn.getBackground();
    //Setting the image.
    btn.setBackgroundResource(R.drawable.ic_launcher);
    btn.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            /*Removing image and setting text*/
            btn.setBackgroundDrawable(buttonDrawable);
            btn.setText("My Button");   
        }
    });
}

回答5:

You can create your own drawable with multiple states and set that to background

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_enabled="false" 
        android:drawable="@drawable/selected" />
    <item android:drawable="@drawable/normal" />
</selector>

Drawables can have rounded corners like so.

<corners android:topLeftRadius="5dp" android:topRightRadius="5dp"
         android:bottomLeftRadius="0.2dp" android:bottomRightRadius="0.2dp"/>