学步园

当页面所有edittext不为空时按钮才可点击。

activity实现TextWatcher接口，oncreate方法添加输入框监听

ed1.addTextChangedListener(this);
ed2.addTextChangedListener(this);
ed3.addTextChangedListener(this);

 @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after)
    {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count)
    {

    }

    @Override
    public void afterTextChanged(Editable s)
    {
	if (StringUtils.isNotEmpty(ed1.getText().toString())
	    && StringUtils.isNotEmpty(ed2.getText().toString())
	    && StringUtils.isNotEmpty(ed3.getText().toString()))
	{
	    okBtn.setEnabled(true);
	}
	else
	{
	    okBtn.setEnabled(false);
	}
    }

为区分按钮状态设置enable=false背景为灰色android:background="@drawable/button_activity"

button_activity.xml文件

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="true"><shape>

                       <solid android:color="@color/programstatus_review" />
         
            <stroke android:width="2dp" android:color="@color/lottery_button" />
           
            <corners android:radius="15dp" />
        </shape></item>
    <item android:state_enabled="false"><shape>
            <stroke android:width="2dp" />

            <solid android:color="@color/c_gray_light" />

            <corners android:radius="15dp" />

            <padding android:bottom="5dp" android:left="20dp" android:right="20dp" android:top="5dp" />
        </shape></item>
    <item><shape>
            <stroke android:width="2dp" />

            <solid android:color="@color/c_gray_1" />

            <corners android:radius="15dp" />

            <padding android:bottom="5dp" android:left="20dp" android:right="20dp" android:top="5dp" />
        </shape></item>

</selector>