activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/rl" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="16dp" tools:context=".MainActivity" android:background="#ee8af5" > <TextView android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="BitmapShader" android:textStyle="bold" android:textSize="90dp" android:fontFamily="sans-serif-condensed" android:textColor="#000" /> <Button android:id="@+id/btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Apply BitmapShader" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" /> </RelativeLayout> MainActivity.java
package com.cfsuman.me.androidcode; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.BitmapShader; import android.graphics.Shader; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.view.Window; import android.widget.Button; import android.widget.RelativeLayout; import android.widget.TextView; public class MainActivity extends AppCompatActivity { private Context mContext; private RelativeLayout mRL; private TextView mTV; private Button mBTN; @Override protected void onCreate(Bundle savedInstanceState) { requestWindowFeature(Window.FEATURE_ACTION_BAR); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Get the application context mContext = getApplicationContext(); // Get the widgets reference from XML layout mRL = (RelativeLayout) findViewById(R.id.rl); mTV = (TextView) findViewById(R.id.tv); mBTN = (Button) findViewById(R.id.btn); // Set a click listener for Button widget mBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { /* BitmapFactory Creates Bitmap objects from various sources, including files, streams, and byte-arrays. public static Bitmap decodeResource (Resources res, int id) Synonym for decodeResource(Resources, int, android.graphics.BitmapFactory.Options) with null Options. Returns The decoded bitmap, or null if the image could not be decoded. */ Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.pattern); /* Shader Known Direct Subclasses BitmapShader, ComposeShader, LinearGradient, RadialGradient, SweepGradient Shader is the based class for objects that return horizontal spans of colors during drawing. A subclass of Shader is installed in a Paint calling paint.setShader(shader). After that any object (other than a bitmap) that is drawn with that paint will get its color(s) from the shader. */ /* BitmapShader Shader used to draw a bitmap as a texture. The bitmap can be repeated or mirrored by setting the tiling mode. public BitmapShader (Bitmap bitmap, Shader.TileMode tileX, Shader.TileMode tileY) Call this to create a new shader that will draw with a bitmap. Parameters bitmap : The bitmap to use inside the shader tileX : The tiling mode for x to draw the bitmap in. tileY : The tiling mode for y to draw the bitmap in. */ /* Shader.TileMode CLAMP : replicate the edge color if the shader draws outside of its original bounds MIRROR : repeat the shader's image horizontally and vertically, alternating mirror images so that adjacent images always seam REPEAT : repeat the shader's image horizontally and vertically */ Shader shader = new BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.REPEAT); /* public void setLayerType (int layerType, Paint paint) Specifies the type of layer backing this view. The layer can be LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE. A layer is associated with an optional Paint instance that controls how the layer is composed on screen. Parameters layerType : The type of layer to use with this view, must be one of LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE paint : The paint used to compose the layer. This argument is optional and can be null. It is ignored when the layer type is LAYER_TYPE_NONE */ /* public static selesai int LAYER_TYPE_SOFTWARE Indicates that the view has a software layer. A software layer is backed by a bitmap and causes the view to be rendered using Android's software rendering pipeline, even if hardware acceleration is enabled. */ mTV.setLayerType(View.LAYER_TYPE_SOFTWARE, null); /* Paint The Paint class holds the style and color information about how to draw geometries, text and bitmaps. */ mTV.getPaint().setShader(shader); } }); } } 
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