Android TextView | 易学教程

问题

I have an example in android that I am trying to run. There were 2 ways to do it..

// Get a drawable 
ColorDrawble redDrawable = (ColorDrawable).getResources().getDrawable(R.drawable.red_rectangle); 

//Set it as a background to a text view 
textView.setBackground(redDrawable);

When I put this in the Eclipse IDE I get an error ColorDrawble cannot be resolved to a type I have the textview in the main XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TextView android:layout_width="fill_parent" 
            android:id="@+id/texter"
          android:layout_height="wrap_content" 
          android:text="this string"/>


</LinearLayout>

and the resources in the strings xml file

<resources>
    <string name="hello">Hello World, ResourceTesterActivity!</string>
    <string name="app_name">ResourceTester</string>
     <drawable name="red_rectangle" >#f00</drawable> 
    <drawable name="blue_rectangle">#0000ff</drawable> 
    <drawable name="green_rectangle" >#f0f0</drawable>
</resources>

回答1:

you can simply use a drawable like this :

// Get a drawable 
Drawable redDrawable = YourActivity.this.getResources().getDrawable(R.drawable.red_rectangle); 

//Set it as a background to a text view 
textView.setBackgroundDrawable(redDrawable);//i've changed setBackground with setBackgroundDrawable.

or you can directly use :

textView.setBackgroundResources(R.drawable.red_rectangle);

NOTE : clean and rebuild your project , and run it to test and for the drawable, you dont need to declare it in strings.xml , just add your drawable on the folder drawables , and it will work

回答2:

It should be:

ColorDrawble redDrawable = (ColorDrawable) 
          getResources().getDrawable(R.drawable.red_rectangle);

You don't need the dot (perhaps it's a typo).

Then press Ctrl+Shift+O (Organize Imports) to import ColorDrawble class.

来源：https://stackoverflow.com/questions/6621372/android-textview

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android

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