AlertDialog中shape的使用方法

shape是用来设置背景图、按钮等样式的一种方法

MainActivity

public class MainActivity extends AppCompatActivity implements View.OnClickListener { private Button mBtn5; @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);  mBtn5 = (Button) findViewById(R.id.button_dialog5);   mBtn5.setOnClickListener(this);   }    @Override    public void onClick(View v) {        switch (v.getId()) {         case R.id.button_dialog5:                showMydialog();                break;           default:                break;                      }          } private void showMydialog() {        dialog = new Dialog(MainActivity.this, R.style.NoDialogTitle);//styleDialogTitle写在res/values/styles下面,是为了去掉原有的背景文本框样式，便于加上自己设计的样式。        LayoutInflater inflater = getLayoutInflater();        View dialogView = inflater.inflate(R.layout.my_dialog, null);        TextView textViewTitle = (TextView) dialogView.findViewById(R.id.textview_title);        TextView textViewMessage = (TextView) dialogView.findViewById(R.id.textview_message);        Button button_cancel = (Button) dialogView.findViewById(R.id.button_cancel);        Button button_ok = (Button) dialogView.findViewById(R.id.button_ok);        textViewTitle.setText("这是新设置的标题");        textViewMessage.setText("这是新设置的内容");        button_cancel.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                dialog.dismiss();            }        });        button_ok.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Toast.makeText(getApplicationContext(), "点击的是确定", Toast.LENGTH_SHORT).show();                dialog.dismiss();            }        });        dialog.setContentView(dialogView);        dialog.show();    }    }

my_dialog.xml

<?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"    android:background="@drawable/dialog_background">    <TextView        android:id="@+id/textview_title"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="我是一个标题"        android:background="@drawable/dialog_title_background"        style="@style/myTextView"//style写在res/values/styles下        />    <TextView        android:id="@+id/textview_message"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="我是内容"        android:gravity="center"        android:textSize="20sp"        android:padding="10dp"/><LinearLayout    android:layout_width="match_parent"    android:layout_height="wrap_content">    <Button        android:id="@+id/button_cancel"        android:layout_width="0dip"        android:layout_height="wrap_content"        android:layout_weight="1"        android:background="@drawable/btn_right_background"        android:text="取消"/>    <Button        android:id="@+id/button_ok"        android:layout_width="0dip"        android:layout_height="wrap_content"        android:layout_weight="1"        android:background="@drawable/btn_left_background"        android:text="确定"/></LinearLayout></LinearLayout>

btn_left_background.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/btn_left_pressed" android:state_pressed="true"/>    <item android:drawable="@drawable/btn_left_normal"/></selector>

btn_left_normal.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">// <dimen name="corners">10dp</dimen>把半径长度全部写在res/values/dimens下，方便以后改变长度。// <corners android:bottomRightRadius="10dp"/>    <corners android:bottomRightRadius="@dimen/corners"/>    <solid android:color="#79DFF6"/>    <stroke android:color="@android:color/white" android:width="5dp"/></shape>

btn_left_pressed.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <corners android:bottomRightRadius="@dimen/corners"/>    <solid android:color="#30AEE8"/>    <stroke android:color="@android:color/white" android:width="5dp"/></shape>

btn_right_background.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/btn_right_pressed" android:state_pressed="true"/>    <item android:drawable="@drawable/btn_right_normal"/></selector>

btn_right_normal.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <corners android:bottomLeftRadius="@dimen/corners"/>    <solid android:color="#79DFF6"/>    <stroke android:color="@android:color/white" android:width="5dp"/></shape>

btn_right_pressed.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <corners android:bottomLeftRadius="@dimen/corners"/>    <solid android:color="#30AEE8"/>    <stroke android:color="@android:color/white" android:width="5dp"/></shape>

dialog_background.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <corners android:radius="15dp"/>    <solid android:color="#8dff3d"/>    <stroke android:color="@android:color/white" android:width="5dp"/></shape>

dialog_title_background.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <corners android:radius="@dimen/corners"/>    <solid android:color="#8dff3d"/>    <stroke android:color="@android:color/white" android:width="1dp"/></shape>

styles.xml

<resources>    <!-- Base application theme. -->    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">        <!-- Customize your theme here. -->    </style>    <style parent="@android:Theme.Dialog" name="NoDialogTitle">      //窗口框架为空，即框架为透明的。        <item name="android:windowFrame">@null</item>      //去掉标题        <item name="android:windowNoTitle">true</item>      //将窗口背景设置为透明的        <item name="android:windowBackground">@android:color/transparent</item>      //窗体设置为悬浮的        <item name="android:windowIsFloating">true</item>     //窗体内容不覆盖        <item name="android:windowContentOverlay">@null</item>    </style>    //TextView的文本颜色，字体大小，填充宽度，方便TextView直接调用。<style name="myTextView">    <item name="android:textColor">#ff0000</item>    <item name="android:textSize">25sp</item>    <item name="android:padding">10dp</item></style></resources>

运行图

双彩虹