android 数字键盘制作

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

    <LinearLayout
        android:id="@+id/k_layout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:orientation="horizontal"
        android:gravity="center">
        <Button
            android:id="@+id/btn_one"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="1"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>
        <Button
            android:id="@+id/btn_two"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="2"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>

        <Button
            android:id="@+id/btn_three"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:text="3"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>

    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:orientation="horizontal"
        android:gravity="center">
        <Button
            android:id="@+id/btn_four"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="4"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>
        <Button
            android:id="@+id/btn_five"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="5"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>

        <Button
            android:id="@+id/btn_six"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:text="6"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>

    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:orientation="horizontal"
        android:gravity="center">
        <Button
            android:id="@+id/btn_seven"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="7"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>
        <Button
            android:id="@+id/btn_eight"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="8"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>

        <Button
            android:id="@+id/btn_nine"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:text="9"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:orientation="horizontal"
        android:gravity="center">
        <Button
            android:id="@+id/btn_clear"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="清空"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>
        <Button
            android:id="@+id/btn_zero"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:text="0"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>

        <Button
            android:id="@+id/btn_del"
            android:onClick="click_key"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="30dp"
            android:text="删除"
            android:textSize="18sp"
            android:textColor="@color/white"
            android:background="@drawable/btn_select_back_t30"/>
    </LinearLayout>
</LinearLayout>

//.....自己看

editText = (EditText) mView.findViewById(R.id.qc_liangpin);
text = (EditText) mView.findViewById(R.id.qc_buliangping);
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        Edit_Tyep = 1;//多个输入框时做的焦点判断 
    }
});
text.setOnFocusChangeListener(new View.OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        Edit_Tyep = 2;
    }
});

Button btn0 = (Button) mView.findViewById(R.id.btn_zero);
btn0.setOnClickListener(listener);
Button btn1 = (Button) mView.findViewById(R.id.btn_one);
btn1.setOnClickListener(listener);
Button btn2 = (Button) mView.findViewById(R.id.btn_two);
btn2.setOnClickListener(listener);
Button btn3 = (Button) mView.findViewById(R.id.btn_three);
btn3.setOnClickListener(listener);
Button btn4 = (Button) mView.findViewById(R.id.btn_four);
btn4.setOnClickListener(listener);
Button btn5 = (Button) mView.findViewById(R.id.btn_five);
btn5.setOnClickListener(listener);
Button btn6 = (Button) mView.findViewById(R.id.btn_six);
btn6.setOnClickListener(listener);
Button btn7 = (Button) mView.findViewById(R.id.btn_seven);
btn7.setOnClickListener(listener);
Button btn8 = (Button) mView.findViewById(R.id.btn_eight);
btn8.setOnClickListener(listener);
Button btn9 = (Button) mView.findViewById(R.id.btn_nine);
btn9.setOnClickListener(listener);
Button btndel = (Button) mView.findViewById(R.id.btn_del);
btndel.setOnClickListener(listener);
Button btnclear = (Button) mView.findViewById(R.id.btn_clear);
btnclear.setOnClickListener(listener);

Button.OnClickListener listener = new Button.OnClickListener() {
    public void onClick(View v) {
        Editable editable = null;
        int start = 0;
        if (Edit_Tyep == 1) {
            editable = editText.getText();
            start = editText.getSelectionStart();

        } else if (Edit_Tyep == 2) {
            editable = text.getText();
            start = text.getSelectionStart();
        } else {
            editable = editText.getText();
            start = editText.getSelectionStart();
        }
        switch (v.getId()) {
            case R.id.btn_zero:
                editable.insert(start, "0");
                break;
            case R.id.btn_one:
                editable.insert(start, "1");
                break;
            case R.id.btn_two:
                editable.insert(start, "2");
                break;
            case R.id.btn_three:
                editable.insert(start, "3");
                break;
            case R.id.btn_four:
                editable.insert(start, "4");
                break;
            case R.id.btn_five:
                editable.insert(start, "5");
                break;
            case R.id.btn_six:
                editable.insert(start, "6");
                break;
            case R.id.btn_seven:
                editable.insert(start, "7");
                break;
            case R.id.btn_eight:
                editable.insert(start, "8");
                break;
            case R.id.btn_nine:
                editable.insert(start, "9");
                break;
            case R.id.btn_clear:
                if (editable != null)
                    editable.delete(0, editable.length());
                break;
            case R.id.btn_del:
                if (start > 0)
                    editable.delete(start - 1, start);
                break;
        }
    }
};

由于时间问题没有 给全代码  关键地方用颜色标出 其实很简单 相信应该能够看懂！