五六周
package
itcast.cn;
import
android.app.AlertDialog;
import
android.content.DialogInterface;
import
android.os.Bundle;
import
android.app.Activity;
public
class
Main2Activity
extends
Activity {
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
}
public
void
onBackPressed(){
AlertDialog dialog;
AlertDialog.Builder builder=
new
AlertDialog.Builder(
this
)
.setTitle(
"普通对话框"
)
.setIcon(R.drawable.ic_launcher_background)
.setMessage(
"是否确定退出"
)
.setPositiveButton(
"确定"
,
new
DialogInterface.OnClickListener() {
public
void
onClick(DialogInterface dialog,
int
which) {
dialog.dismiss();
Main2Activity.
this
.finish();}
})
.setNegativeButton(
"取消"
,
new
DialogInterface.OnClickListener() {
public
void
onClick(DialogInterface dialog,
int
which) {
dialog.dismiss();
}
});
dialog=builder.create();
dialog.show();
}
}
2.
<LinearLayout xmlns:android=
"http://schemas.android.com/apk/res/android"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent"
android:orientation=
"vertical"
>
<Button
android:id=
"@+id/bt_1"
android:layout_width=
"wrap_content"
android:layout_height=
"100dp"
android:text=
"单选框"
android:gravity=
"center"
android:layout_marginTop=
"50dp"
android:layout_gravity=
"center"
>
</Button>
</LinearLayout>
package
itcast.cn;
import
android.app.Activity;
import
android.app.AlertDialog;
import
android.content.DialogInterface;
import
android.os.Bundle;
import
android.view.View;
import
android.widget.Toast;
public
class
Main2Activity
extends
Activity
implements
View.OnClickListener{
private
int
i=
1
;
private
int
i1[]={
1
,
2
};
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
findViewById(R.id.bt_1).setOnClickListener(
this
);
}
public
void
onClick(View v){
AlertDialog dialog;
AlertDialog.Builder builder =
new
AlertDialog.Builder(
this
);
builder.setTitle(
"你的性别是?"
);
builder.setSingleChoiceItems(
new
String[]{
"女"
,
"男"
},i,
new
DialogInterface.OnClickListener(){
public
void
onClick(DialogInterface dialog,
int
which){
i=which;
}
});
builder.setPositiveButton(
"确定"
,
new
DialogInterface.OnClickListener() {
public
void
onClick(DialogInterface dialog,
int
which) {
if
(i==
1
){
Toast.makeText(Main2Activity.
this
,
"你选择了男"
,Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(Main2Activity.
this
,
"你选择了女"
,Toast.LENGTH_SHORT).show();
}
dialog.dismiss();
}
});
builder.setNegativeButton(
"取消"
,
new
DialogInterface.OnClickListener() {
@Override
public
void
onClick(DialogInterface dialog,
int
which) {
dialog.dismiss();
}
});
dialog = builder.create();
dialog.show();
}
}
3.
<?xml version=
"1.0"
encoding=
"utf-8"
?>
<LinearLayout xmlns:android=
"http://schemas.android.com/apk/res/android"
xmlns:app=
"http://schemas.android.com/apk/res-auto"
xmlns:tools=
"http://schemas.android.com/tools"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent"
android:orientation=
"vertical"
>
<TextView
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"1.TextView显示的文本信息"
android:textSize=
"25dp"
android:layout_marginLeft=
"50dp"
android:textColor=
"#8E8E8E"
/>
<Button
android:layout_width=
"match_parent"
android:layout_height=
"wrap_content"
android:layout_marginLeft=
"50dp"
android:layout_marginTop=
"10dp"
android:layout_marginRight=
"50dp"
android:textSize=
"25dp"
android:text=
"2.按钮"
android:textColor=
"#8E8E8E "
/>
<EditText
android:layout_width=
"match_parent"
android:layout_height=
"wrap_content"
android:text=
"3.编辑框:请输入信息"
android:textSize=
"25dp"
android:textColor=
"#8E8E8E "
android:layout_marginLeft=
"25dp"
android:layout_marginTop=
"10dp"
/>
<RadioGroup
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:layout_marginLeft=
"15dp"
android:orientation=
"horizontal"
>
<RadioButton
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"4.男"
android:checked=
"true"
android:textColor=
"#8E8E8E"
android:textSize=
"25dp"
></RadioButton>
<RadioButton
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"女"
android:textColor=
"#8E8E8E "
android:textSize=
"25dp"
></RadioButton>
</RadioGroup>
<CheckBox
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"电脑"
android:textSize=
"25dp"
android:textColor=
"#8E8E8E "
android:checked=
"true"
android:layout_marginLeft=
"20dp"
/>
<CheckBox
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"手机"
android:textSize=
"25dp"
android:textColor=
"#8E8E8E "
android:checked=
"true"
android:layout_marginLeft=
"20dp"
/>
</LinearLayout>
4.
<?xml version=
"1.0"
encoding=
"utf-8"
?>
<RelativeLayout xmlns:android=
"http://schemas.android.com/apk/res/android"
xmlns:app=
"http://schemas.android.com/apk/res-auto"
xmlns:tools=
"http://schemas.android.com/tools"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent"
android:background=
"#7AD610"
tools:context=
".MainActivity"
>
<TextView
android:id=
"@+id/tv1"
android:layout_width=
"match_parent"
android:layout_height=
"wrap_content"
android:text=
"1.TextView显示文本信息"
android:textColor=
"#F81D0D"
android:textSize=
"25sp"
android:textStyle=
"italic"
android:gravity=
"center"
android:layout_marginTop=
"30dp"
/>
<Button
android:id=
"@+id/bt1"
android:layout_width=
"350dp"
android:layout_height=
"wrap_content"
android:layout_centerHorizontal=
"true"
android:layout_below=
"@+id/tv1"
android:text=
"2.按钮"
android:textColor=
"#F81D0D"
android:textSize=
"25sp"
android:layout_marginTop=
"10dp"
android:padding=
"10dp"
/>
<EditText
android:id=
"@+id/et1"
android:layout_width=
"match_parent"
android:layout_height=
"wrap_content"
android:hint=
"3.编辑框:请输入信息"
android:textColorHint=
"#F81D0D"
android:textSize=
"25sp"
android:layout_below=
"@+id/bt1"
android:layout_alignStart=
"@+id/bt1"
android:layout_marginTop=
"5dp"
android:padding=
"10dp"
android:layout_alignLeft=
"@+id/bt1"
/>
<RadioGroup
android:id=
"@+id/rg1"
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:layout_below=
"@+id/et1"
android:layout_alignLeft=
"@+id/et1"
android:orientation=
"horizontal"
android:padding=
"10dp"
>
<RadioButton
android:id=
"@+id/rb1"
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"4.男"
android:textColor=
"#F81D0D"
android:textSize=
"25sp"
/>
<RadioButton
android:id=
"@+id/rb2"
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"女"
android:textColor=
"#F81D0D"
android:textSize=
"25sp"
/>
</RadioGroup>
<LinearLayout
android:id=
"@+id/ll1"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent"
android:orientation=
"vertical"
android:layout_alignLeft=
"@+id/rg1"
android:layout_below=
"@id/rg1"
>
<CheckBox
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"电脑"
android:textSize=
"25sp"
android:textColor=
"#F81D0D"
/>
<CheckBox
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"手机"
android:textSize=
"25sp"
android:textColor=
"#F81D0D"
/>
</LinearLayout>
</RelativeLayout>