自定义view画圆实现进度条的显示
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1,TitleView的实现
public class TitleView extends LinearLayout {
public TitleView(Context context) {
this(context, null);
}
public TitleView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public TitleView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// setContentView
View inflate = LayoutInflater.from(context).inflate(R.layout.title_layout, this);
ImageButton left = inflate.findViewById(R.id.left_btn);
ImageButton right = inflate.findViewById(R.id.right_btn);
left.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
callBack.leftClick();
}
});
right.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
callBack.rightClick();
}
});
}
public LeftCallBack callBack;
public void setCallBack(LeftCallBack callBack) {
this.callBack = callBack;
}
interface LeftCallBack {
public void leftClick();
public void rightClick();
}
}
2,JdtView的实现
public class JdtView extends View {
private Paint paint = new Paint();
private boolean runing = true;
private int p = 0;
Context context;
public JdtView(Context context) {
super(context);
}
public JdtView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
paint.setAntiAlias(true);//抗锯齿
paint.setStyle(Paint.Style.STROKE);//设置画笔 填充是空心的
}
public void start() {
new Thread(new Runnable() {
@Override
public void run() {
while (runing) {
if (p >= 360) {
runing = false;
return;
}
System.out.println("p = " + p);
p += 10;
postInvalidate(); //子线程刷新 系统调用onDraw() 方法
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
public JdtView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int x = getWidth() / 2;
int y = getHeight() / 2;
paint.setColor(Color.GRAY);//设置画笔的颜色
paint.setStrokeWidth(30);//设置画笔的粗细
canvas.drawCircle(x, y, 200, paint);
paint.setColor(Color.GREEN);//设置画笔的颜色
int radius = 200;//设置园的大小
//定义一个区域
RectF rectF = new RectF(x - radius, y - radius, x + radius, y + radius);
//画弧
// useCentor true 从中心点开始画 false 中心点不现实
canvas.drawArc(rectF, -0, p, false, paint);
int text = (int) ((float) p / 360 * 100);
// measureText 测量字符串的宽度
float textWidth = paint.measureText(text + "%");
Rect rextText = new Rect();
// rextText.height() 获取字符串的高度
paint.getTextBounds(text + "%", 0, (text + "%").length(), rextText);
paint.setTextSize(30);
paint.setStrokeWidth(1);
//画文字
canvas.drawText(text + "%", x - textWidth / 2, y + rextText.height() / 2, paint);
if (p == 360) {
Intent intent = new Intent(context, CaptureActivity.class);
context.startActivity(intent);
}
}
}
3,TiXingView的实现
public class TiXingView extends View {
private Paint paint = new Paint();
public TiXingView(Context context) {
super(context);
}
public TiXingView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public TiXingView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int x = getWidth();
int y = getHeight();
paint.setColor(Color.YELLOW);
canvas.drawRect(0, 0, x/3, 125, paint);
paint.setColor(Color.GREEN);
canvas.drawRect(x/3, 125, x/3*2, 250, paint);
paint.setColor(Color.YELLOW);
canvas.drawRect(x/3*2, 250, x, 375, paint);
}
}
4,MainActivity 的实现
public class MainActivity extends Activity implements TitleView.LeftCallBack {
public TitleView titleView;
private JdtView jdtView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
jdtView = findViewById(R.id.jdt_view);
findViewById(R.id.sm).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
jdtView.start();
}
});
titleView = (TitleView) findViewById(R.id.titleview_id);
titleView.setCallBack(this);
}
@Override
public void leftClick() {
}
@Override
public void rightClick() {
Intent intent = new Intent(MainActivity.this, MainActivity2.class);
startActivity(intent);
}
}
5,MainActivity2的实现,
public class MainActivity2 extends Activity {
private ImageButton back;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
back = findViewById(R.id.left_btn);
back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity2.this, MainActivity.class);
startActivity(intent);
}
});
}
}
6,activity_main布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<panjiangang.bwie.com.day05.TitleView
android:id="@+id/titleview_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"></panjiangang.bwie.com.day05.TitleView>
</LinearLayout>
<panjiangang.bwie.com.day05.JdtView
android:id="@+id/jdt_view"
android:layout_width="match_parent"
android:layout_height="300dp" />
<Button
android:id="@+id/sm"
android:layout_width="150dp"
android:layout_height="50dp"
android:layout_gravity="center_horizontal"
android:text="扫描二维码" />
</LinearLayout>
7title布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#D1EEEE"
android:orientation="horizontal">
<ImageButton
android:id="@+id/left_btn"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:src="@drawable/left_title" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1"
android:gravity="center"
android:text="那些花儿"
android:textSize="30dp" />
<ImageButton
android:id="@+id/right_btn"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:src="@drawable/right_title" />
</LinearLayout>
</LinearLayout>
8,activity2布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#D1EEEE"
android:orientation="horizontal">
<ImageButton
android:id="@+id/left_btn"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:src="@drawable/left_title" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1"
android:gravity="center"
android:text="那些花儿"
android:textSize="30dp" />
<ImageButton
android:id="@+id/right_btn"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:src="@drawable/right_title" />
</LinearLayout>
<panjiangang.bwie.com.day05.TiXingView
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
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