本文实例为大家分享了Android九宫格展示的具体代码，供大家参考，具体内容如下

（设置的有最少连几个和最大连几个）

MainActivity

public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); NineView view = new NineView(this); setContentView(view); view.setOnPasswordFinishListener(new NineView.OnPasswordFinishListener() { @Override public void onPasswordFinish(String password) { Toast.makeText(getBaseContext(), "密码:" + password, Toast.LENGTH_SHORT).show(); } }); }}

NineView

public class NineView extends View { int width; Paint paintback = new Paint(); Paint paintsrc = new Paint(); int background; //保证是正方形 int max = 6; //密码的个数 6 int min = 4; //点在哪里 float currX, currY; public NineView(Context context) { super(context); init(); } public NineView(Context context, AttributeSet attrs) { super(context, attrs); init(); } public void init() { paintback.setDither(true); paintback.setAntiAlias(true); paintsrc.setDither(true); paintsrc.setAntiAlias(true); //171625 background = Color.rgb(0x17, 0x16, 0x25); paintback.setColor(background); //3791E6 paintsrc.setColor(Color.rgb(0x37, 0x91, 0xe6)); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); width = getWidth() / 4; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //清屏 canvas.drawColor(background); //划线 if (result.size() > 0) { //点 int x = result.get(result.size() - 1) % 3 + 1; int y = result.get(result.size() - 1) / 3 + 1; paintsrc.setStrokeWidth(10); canvas.drawLine(x * width, y * width, currX, currY, paintsrc); canvas.drawCircle(x * width, y * width, width / 3, paintback); if (result.size() > 1) { //防止越界 for (int i = 0; i < result.size() - 1; i++) { // 1 2 3 <=2 //需要取当前的i和下一个i //按住的前一个点 int x1 = result.get(i) % 3 + 1; int y1 = result.get(i) / 3 + 1; //按住的后一个点 int x2 = result.get(i + 1) % 3 + 1; int y2 = result.get(i + 1) / 3 + 1; paintsrc.setStrokeWidth(10); canvas.drawLine(x1 * width, y1 * width, x2 * width, y2 * width, paintsrc); canvas.drawCircle(x1 * width, y1 * width, width / 3, paintback); } } } paintsrc.setStrokeWidth(2); //9个圆 paintsrc.setStyle(Paint.Style.STROKE); for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { canvas.drawCircle((i + 1) * width, (j + 1) * width, width / 3, paintsrc); } } paintsrc.setStyle(Paint.Style.FILL); for (Integer integer : result) { //i j ; // 8 2 2 int j = integer / 3 + 1; int i = integer % 3 + 1; canvas.drawCircle(i * width, j * width, width / 8, paintsrc); } } //密码 List<Integer> result = new ArrayList<>(); @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX(); float y = event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: //勾股定理 int i = isConnPoint(x, y); //只要在园内 if (i != -1) { result.add(i); currX = x; currY = y; } Log.e("TAG", "=====" + i); break; case MotionEvent.ACTION_MOVE: currX = x; currY = y; //移动到其他的圆中，那么接着去添加result int point = isConnPoint(x, y); if (point != -1 && !result.contains((Integer) point)) { result.add(point); if (result.size() > max) { //reslut清空 if (onPasswordFinishListener != null) onPasswordFinishListener.onPasswordFinish(getPassword()); result.clear(); } } break; case MotionEvent.ACTION_UP: if (result.size() >= min) { if (onPasswordFinishListener != null) onPasswordFinishListener.onPasswordFinish(getPassword()); } result.clear(); break; } invalidate(); return true; } public String getPassword() { String password = ""; for (Integer integer : result) { password += integer + ""; } return password; } //判断 public int isConnPoint(float x, float y) { //9 width,width width for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { if (pointOnCircle(x, y, (j + 1) * width, (i + 1) * width)) { return i * 3 + j; //0-8 } } } return -1; } public boolean pointOnCircle(float x, float y, int cx, int cy) {//true Log.e("TAG", ((cx - x) * (cx - x) + (cy - y) * (cy - y)) + ""); Log.e("TAG", ((float) width / 3f) * ((float) width / 3f) + ""); float i = ((cx - x) * (cx - x) + (cy - y) * (cy - y)); float j = ((float) width / 3f) * ((float) width / 3f); return i < j; } public void setOnPasswordFinishListener(OnPasswordFinishListener onPasswordFinishListener) { this.onPasswordFinishListener = onPasswordFinishListener; } private OnPasswordFinishListener onPasswordFinishListener; public interface OnPasswordFinishListener { void onPasswordFinish(String password); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。