有时候Android自带的控件无法满足我们的某些要求，这时就需要我们自定义控件来实现这些功能。比如需要一个TextView里的字倾斜一定的角度，就需要自定义TextView。

代码如下：

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

package com.android.textviewrotatedemo;   import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.util.AttributeSet; import android.view.Gravity; import android.widget.TextView;   /**   * Created by zhenxixianzai on 2015/5/5.   */ public class RotateTextView extends TextView {      private static final int DEFAULT_DEGREES = 0 ;      private int mDegrees;        public RotateTextView(Context context) {          super (context, null );      }        public RotateTextView(Context context, AttributeSet attrs) {          super (context, attrs, android.R.attr.textViewStyle);          this .setGravity(Gravity.CENTER);          TypedArray a = context.obtainStyledAttributes(attrs,                  R.styleable.RotateTextView);          mDegrees = a.getDimensionPixelSize(R.styleable.RotateTextView_degree,                  DEFAULT_DEGREES);          a.recycle();      }        @Override      protected void onMeasure( int widthMeasureSpec, int heightMeasureSpec) {          super .onMeasure(widthMeasureSpec, heightMeasureSpec);          setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth());      }        @Override      protected void onDraw(Canvas canvas) {          canvas.save();          canvas.translate(getCompoundPaddingLeft(), getExtendedPaddingTop());          canvas.rotate(mDegrees, this .getWidth() / 2f, this .getHeight() / 2f);          super .onDraw(canvas);          canvas.restore();      }        public void setDegrees( int degrees) {          mDegrees = degrees;      } }

styles 如下：

 

 

1 2 3

<declare-styleable name= "RotateTextView" >                </attr></declare-styleable>

 

 

用法：

1 2 3 4 5 6 7 8 9 10

<linearlayout android:layout_height= "match_parent" android:layout_width= "match_parent" android:orientation= "vertical" xmlns:android= "" xmlns:tools= "" >        <com.android.textviewrotatedemo.rotatetextview android:autolink= "all" android:gravity= "center" android:id= "@+id/ceshi" android:layout_gravity= "center" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:text= "" >      <com.android.textviewrotatedemo.rotatetextview android:autolink= "all" android:gravity= "center" android:id= "@+id/ceshi1" android:layout_gravity= "center" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:text= "测试测试测试" >      <com.android.textviewrotatedemo.rotatetextview android:autolink= "all" android:gravity= "center" android:id= "@+id/ceshi2" android:layout_gravity= "center" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:text= "测试测试测试" >      <com.android.textviewrotatedemo.rotatetextview android:autolink= "all" android:gravity= "center" android:id= "@+id/ceshi3" android:layout_gravity= "center" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:text= "测试测试测试4" >      <com.android.textviewrotatedemo.rotatetextview android:autolink= "all" android:gravity= "center" android:id= "@+id/ceshi4" android:layout_gravity= "center" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:text= "测试测试测试" >     </com.android.textviewrotatedemo.rotatetextview></com.android.textviewrotatedemo.rotatetextview></com.android.textviewrotatedemo.rotatetextview></com.android.textviewrotatedemo.rotatetextview></com.android.textviewrotatedemo.rotatetextview></linearlayout>

 部分：

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

package com.android.textviewrotatedemo;   import android.app.Activity; import android.os.Bundle;   public class MainActivity extends Activity {      private RotateTextView mTextView;      private RotateTextView mTextView1;      private RotateTextView mTextView2;      private RotateTextView mTextView3;      private RotateTextView mTextView4;      private RotateTextView mTextView5;        @Override      protected void onCreate(Bundle savedInstanceState) {          super .onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          mTextView = (RotateTextView) findViewById(R.id.ceshi);          mTextView.setDegrees( 10 );          mTextView1 = (RotateTextView) findViewById(R.id.ceshi1);          mTextView1.setDegrees( 350 );          mTextView2 = (RotateTextView) findViewById(R.id.ceshi2);          mTextView2.setDegrees( 180 );          mTextView3 = (RotateTextView) findViewById(R.id.ceshi3);          mTextView3.setDegrees( 90 );          mTextView4 = (RotateTextView) findViewById(R.id.ceshi4);          mTextView4.setDegrees( 290 );        } }

附上效果图：

 

项目地址:

https://coding.net/u/leigo/p/RotateTextView/git