android 圆形纯数字按钮

最近在搞一个数字拨号按键按钮,就想到使用GridView,但在实现中遇到点问题,在给数字键进行圆形状态键设置时发现一个问题,GridView中自带的原生选择矩形按钮总是存在,于是就想到了让其状态背景设置成透明.

一,自定义按钮控件RelativeLayout

public class KeyboardView extends RelativeLayout {
    Context mContext;
    private GridView gridView;
    private List<Map<String, String>> dataList;
    public KeyboardView(Context context) {
        this(context, null);
    }
    public KeyboardView(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.mContext = context;
        View view = View.inflate(context, R.layout.layout_virtual_keyboard, null);
        dataList = new ArrayList<>();
        gridView = (GridView) view.findViewById(R.id.gv_keybord);
        initDataList();
        setupView();
        addView(view);  //添加view
    }
    public List<Map<String, String>> getDataList() {
        return dataList;
    }
    private void initDataList() {   //初始化数字数据
        for (int i = 1; i < 13; i++) {
            Map<String, String> map = new HashMap<>();
            if (i < 10) {
                map.put("keyName", String.valueOf(i));
            } else if (i == 10) {
                map.put("keyName", "*");
            } else if (i == 11) {
                map.put("keyName", String.valueOf(0));
            } else if (i == 12) {
                map.put("keyName", "#");
            }
            dataList.add(map);
        }
    }
    public GridView getGridView() {
        return gridView;
    }
    private void setupView() {
        KeyBoardAdapter keyBoardAdapter = new KeyBoardAdapter(mContext, dataList);
        gridView.setAdapter(keyBoardAdapter);
    }
}

填充的GridView布局其中android:listSelector=”@android:color/transparent”设置GridView选择器背景为透明色就可以按照item设置的样式显示状态选择了

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:background="#3F51B5"
    android:layout_height="wrap_content">
    <!-- 键盘 -->
    <GridView
        android:id="@+id/gv_keybord"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:listSelector="@android:color/transparent"
        android:horizontalSpacing="1dp"
        android:numColumns="3"
        android:verticalSpacing="1dp" />
</FrameLayout>

二,GridView适配器,其中填充的item的背景可以是UI切的选型图,也可以自己通过shape绘制出来

public class KeyBoardAdapter extends BaseAdapter {
    private Context mContext;
    private List<Map<String, String>> mDataList;
    public KeyBoardAdapter(Context context, List<Map<String, String>> dataList) {
        this.mContext = context;
        this.mDataList = dataList;
    }
    @Override
    public int getCount() {
        return mDataList.size();
    }

    @Override
    public Object getItem(int position) {
        return mDataList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;
        if (convertView == null) {
            convertView = View.inflate(mContext, R.layout.grid_item_virtual_keyboard, null);
            viewHolder = new ViewHolder();
            viewHolder.btnKey = (TextView) convertView.findViewById(R.id.btn_keys);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
            viewHolder.btnKey.setText(mDataList.get(position).get("keyName"));
        return convertView;
    }

    public final class ViewHolder {
        public TextView btnKey;
    }
}

适配器item布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/btn_keys"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_centerInParent="true"
        android:gravity="center"
        android:background="@drawable/phone_bt_dial_num_selected"
        android:textColor="#333333"
        android:textSize="32sp" />

</RelativeLayout>

三,在Activity中调用,首先要禁止系统的按键的弹出

public class NormalKeyBoardActivity extends AppCompatActivity {
    private KeyboardView keyboardView;
    private GridView gridView;
    private List<Map<String, String>> valueList;
    private EditText textNum;
    private ImageButton phone_delete;
    private String amount;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_keyboard);
        initView();
        valueList = keyboardView.getDataList();
        phoneDelete();
    }

    private void phoneDelete() {
        phone_delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                DeleteNum();
            }
        });
    }
    //删除键删除的数字
    private void DeleteNum() {
        if (amount.length() > 0) {
            amount = amount.substring(0, amount.length() - 1);
            textNum.setText(amount);
            Editable ea = textNum.getText();
            textNum.setSelection(ea.length());
        }
    }

    private void initView() {
        textNum = (EditText) findViewById(R.id.textAmount);
        // 不调用系统键盘
        if (android.os.Build.VERSION.SDK_INT <= 10) {
            textNum.setInputType(InputType.TYPE_NULL);
        } else {
            this.getWindow().setSoftInputMode(
                    WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
            try {
                Class<EditText> cls = EditText.class;
                Method setShowSoftInputOnFocus;
                setShowSoftInputOnFocus = cls.getMethod("setShowSoftInputOnFocus",
                        boolean.class);
                setShowSoftInputOnFocus.setAccessible(true);
                setShowSoftInputOnFocus.invoke(textNum, false);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        keyboardView = (KeyboardView) findViewById(R.id.virtualKeyboardView);
        phone_delete = (ImageButton) findViewById(R.id.phone_bt_del);
        gridView = keyboardView.getGridView();
        gridView.setOnItemClickListener(onItemClickListener);
        textNum.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                keyboardView.setFocusable(true);
                keyboardView.setFocusableInTouchMode(true);
                keyboardView.setVisibility(View.VISIBLE);
            }
        });

    }
    private AdapterView.OnItemClickListener onItemClickListener = new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
            if (position < 11 && position != 9) {
                amount = textNum.getText().toString().trim();
                amount = amount + valueList.get(position).get("keyName");
                textNum.setText(amount);
                Editable ea = textNum.getText();
                textNum.setSelection(ea.length());
            } else {
                if (position == 9) {
                    amount = textNum.getText().toString().trim();
                        amount = amount + valueList.get(position).get("keyName");
                        textNum.setText(amount);
                        Editable ea = textNum.getText();
                        textNum.setSelection(ea.length());
                }else if (position == 11) {
                    String amount = textNum.getText().toString().trim();
                    amount = amount + valueList.get(position).get("keyName");
                    textNum.setText(amount);
                    Editable ea = textNum.getText();
                    textNum.setSelection(ea.length());
                }
            }
        }

    };
}

activity中的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="50dp">

        <EditText
            android:id="@+id/textAmount"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:inputType="numberDecimal"
            android:padding="14dp"
            android:gravity="center_horizontal"
            android:textColor="#333333"
            android:textSize="34sp" />

        <ImageButton
            android:id="@+id/phone_bt_del"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right|center_vertical"
            android:src="@drawable/phone_bt_del_num_selected" />
    </FrameLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:layout_marginRight="80dp"
        android:layout_marginLeft="80dp"
        android:layout_height="wrap_content">
    <com.ts.widget.KeyboardView
        android:id="@+id/keyboardView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <ImageButton
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:background="#00EC69"
        android:src="@drawable/phone_icon_answer"
        android:text="拨号" />
    </LinearLayout>
</LinearLayout>