package com.example.wang.testapp2;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.util.Random;
public class ZuoyeActivity
extends AppCompatActivity {
Button bt_2;
Button bt_3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zuoye);
bt_2=
(Button)findViewById(R.id.bt_2);
bt_3=
(Button)findViewById(R.id.bt_3);
}
//
public void bt1_OnClick(View v)
{
String string=""
;
Random random =
new Random();
final String[] str =
new String[6
];
for(
int i=0;i<6;i++
)
{
int t=random.nextInt(9
);
str[i]=
String.valueOf(t);
string=string+
str[i];
}
if (str[0]=="0"
)
{
str[0]=String.valueOf(random.nextInt(9
));
string=str[0]+str[1]+str[2]+str[3]+str[4]+str[5
];
}
Log.e("TAG", "string=" +
string);
View view=View.inflate(
this,R.layout.activity_zuoye2,
null);
final AlertDialog alertDialog =
new AlertDialog.Builder(
this)
.setTitle("生成最大值和最小值"
)
.setView(view)
.setPositiveButton("最小值",
new DialogInterface.OnClickListener() {
String string1=""
;
@Override
public void onClick(DialogInterface dialog,
int which) {
AlertDialog al =
(AlertDialog)dialog;
int[] a =
new int[6
];
for (
int i = 0; i < 6; i++
) {
a[i] =
Integer.parseInt(str[i]);
Log.e("TAG","a[}="+
a[i]);
}
for (
int i = 0; i < 6; i++
) {
for (
int j = 0; j < 5-i; j++
) {
if (a[j] > a[j + 1
]) {
int b =
a[j];
a[j] = a[j + 1
];
a[j + 1] =
b;
}
}
}
for (
int i = 0; i < 6; i++
) {
str[i]=
String.valueOf(a[i]);
string1=string1+
str[i];
}
Intent intent=
new Intent(ZuoyeActivity.
this,ZuoyeActivity3.
class);
//intent.setData(Uri.parse(string1));
intent.putExtra("jieguo"
,string1);
startActivity(intent);
// EditText et_jieguo=(EditText)al.findViewById(R.id.et_jieguo);
//
// et_jieguo.setText(string1);
}
})
.setNegativeButton("最大值",
null)
.show();
EditText et_suiji=
(EditText)alertDialog.findViewById(R.id.et_suiji);
et_suiji.setText(string);
}
public void bt2_OnClick(View v)
{
final AlertDialog alertDialog=
new AlertDialog.Builder(
this)
.setTitle("提示"
)
.setMessage("确定要删除吗？" + "\n" + "要删除，请点击“是”。"
)
.setNegativeButton("否",
null)
.setPositiveButton("是",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
Toast.makeText(ZuoyeActivity.this, "删除成功" +
which, Toast.LENGTH_SHORT).show();
}
})
.show();
}
public void bt3_OnClick(View v)
{
View view=View.inflate(
this, R.layout.activity_zuoye1,
null);
new AlertDialog.Builder(
this)
.setTitle("请输入电话号码"
)
.setView(view)
.setNeutralButton("拨出此号码",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
AlertDialog al =
(AlertDialog) dialog;
EditText et_1 =
(EditText) al.findViewById(R.id.et_1);
String str =
et_1.getText().toString();
Intent intent =
new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" +
str));
try {
startActivity(intent);
} catch (Exception e) {
e.printStackTrace();
}
}
})
.setPositiveButton("向此号码发短信",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
AlertDialog al=
(AlertDialog)dialog;
EditText et_1 =
(EditText) al.findViewById(R.id.et_1);
String str =
et_1.getText().toString();
Intent intent =
new Intent(Intent.ACTION_SENDTO);
intent.setData(Uri.parse("smsto:"+
str));
startActivity(intent);
}
})
.show();
}
}
View Code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.wang.testapp2.ZuoyeActivity3">
<
EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:id="@+id/et_jieguo" />
</RelativeLayout>
View Code
package com.example.wang.testapp2;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.EditText;
public class ZuoyeActivity3
extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zuoye3);
EditText et_jieguo=
(EditText)findViewById(R.id.et_jieguo);
Intent intent=
getIntent();
String s=intent.getStringExtra("jieguo"
);
et_jieguo.setText(s);
}
}
View Code
<?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">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="练习题1"
android:id="@+id/bt_1"
android:onClick="bt1_OnClick"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="练习题2"
android:id="@+id/bt_2"
android:onClick="bt2_OnClick"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="练习题3"
android:id="@+id/bt_3"
android:onClick="bt3_OnClick"/>
</LinearLayout>
View Code
<?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:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="随机数："
android:textSize="25sp"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/et_suiji" />
</LinearLayout>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:id="@+id/et_jieguo" />
</LinearLayout>
View Code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.wang.testapp2.ZuoyeActivity3">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:id="@+id/et_jieguo" />
</RelativeLayout>
View Code
转载于:https://www.cnblogs.com/wangchuanqi/p/5492158.html
相关资源：android基本控件练习
