这是使用PorterDuffXfermode进行此操作的一种方法.

public class MainActivity extends Activity {

private EditText mEditText;

private ImageView mImageView;

private Bitmap mTexture;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mEditText = (EditText) findViewById(R.id.activity_main_edittext);

mImageView = (ImageView) findViewById(R.id.activity_main_image);

mTexture = BitmapFactory.decodeResource(getResources(),R.drawable.texture);

}

public void onTextCreate(View v) {

final String text = mEditText.getEditableText().toString();

Bitmap result = Bitmap.createBitmap(mTexture.getWidth(),mTexture.getHeight(),Bitmap.Config.ARGB_8888);

Canvas canvas = new Canvas(result);

Paint paint = new Paint();

paint.setAntiAlias(true);

paint.setTextSize(200);

paint.setARGB(255,0);

canvas.drawText(text,200,paint);

paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));

canvas.drawBitmap(mTexture,paint);

paint.setXfermode(null);

mImageView.setImageBitmap(result);

}

}

布局非常简单：

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

android:id="@+id/activity_main_edittext"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:hint="Write a sample text" />

android:id="@+id/activity_main_image"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true" />

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:onClick="onTextCreate"

android:text="Do it!" />

这段代码使用canvas.drawText()写文本.如果要使用常规TextView,可以：

>创建TextView>设置文本>使用textView.draw(canvas)将TextView绘制到画布中;>而不是使用canvas.drawText()而不是canvas.drawBitmap()