练习题

1.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.lx">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

2.ManiActivity.java

package com.example.administrator.lx;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Toast;

import java.net.URI;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void suiji(View v)
    {
        LayoutInflater layoutInflater = getLayoutInflater();
        View view = layoutInflater.inflate(R.layout.suiji,null);
        new  AlertDialog.Builder(this)
                .setTitle("随机数")
                .setView(view)
                .show();
    }
    public void duihua(View v)
    {
        AlertDialog alertDialog = new AlertDialog.Builder(this)
                .setTitle("提示")
                .setMessage("你确定要删除吗？")
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "取消删除……", Toast.LENGTH_SHORT).show();
                    }
                })
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "确定删除……", Toast.LENGTH_SHORT).show();
                    }
                })
                .setCancelable(false)
                .show();
    }
    public void phone(View v)
    {
        LayoutInflater layoutInflater = getLayoutInflater();
        View view = layoutInflater.inflate(R.layout.phone, null);

        new AlertDialog.Builder(this)

                .setTitle("phone")
                .setView(view)
                .setCancelable(false)
                .show();

        Intent intent = new Intent(Intent.ACTION_CALL);

        Uri uri = Uri.parse("");

        intent.setData(uri);

        try {
            startActivity(intent);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}

3.activity_mani.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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.administrator.lx.MainActivity"
    android:orientation="vertical">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="随机数"
        android:onClick="suiji"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="对话框"
        android:onClick="duihua"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="电话短信"
        android:onClick="phone"/>
</LinearLayout>

4.suiji.xml

<?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">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="请点击按钮生成随机数"
        android:textSize="20dp"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="单击生成"
        android:id="@+id/suiji"
        />
</LinearLayout>

5.phone.xml

<?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">
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="请输入电话号码"
        android:id="@+id/text"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="拨打电话"
        android:id="@+id/phone"
        android:onClick="ding"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="发送短信"
        android:id="@+id/sms"
        android:onClick="dang"/>
</LinearLayout>