Android学习第一天笔记

Android基础第一天

adb

什么是adb

android debug bridge

将adb添加到环境变量里面去

adb在platform-tool目录下面

adb命令

• adb start-server，启动adb
• adb kill-server，关闭adb
• adb install apk名字，安装apk到android设备里面
• adb uninstall 应用包名，卸载某个app
• adb devices，列出与开发环境建立连接的设备列表
• adb shell，进入android设备命令行
• netstae -ano，windows上查看进程是否占用了adb的端口，占用了就把那个进程杀死

打电话demo

• MainActivity.java

package com.dasudian.callphone;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button call = (Button) findViewById(R.id.bt_call);
        call.setOnClickListener(new MyClickListener());
    }

    class MyClickListener implements View.OnClickListener {

@Override
public void onClick(View v) {
            EditText et = (EditText) findViewById(R.id.et_phone);
            String phone = et.getText().toString();
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_CALL);
            intent.setData(Uri.parse("tel:" + phone));
            startActivity(intent);
        }
    }
}

• manifest文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dasudian.callphone">
<!-- 添加打电话权限，不然运行时会崩溃 -->
<uses-permission android:name="android.permission.CALL_PHONE" />

<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>

• 布局文件

<?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:orientation="vertical"
tools:context="com.dasudian.callphone.MainActivity">

<TextView
 android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="请输入电话号码" />

<EditText
 android:id="@+id/et_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<Button
 android:id="@+id/bt_call"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="拨号" />
</LinearLayout>

发短信demo

• MainActivity.java文件

package com.dasudian.smssend;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

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

final EditText et_phone = (EditText) findViewById(R.id.et_phone);
final EditText et_content = (EditText) findViewById(R.id.et_content);
        Button send = (Button) findViewById(R.id.bt_send);
assert send != null;
        send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
                String phone = et_phone.getText().toString();
                String content = et_content.getText().toString();

                SmsManager smsManager = SmsManager.getDefault();
// 当内容太长的时候，分割后在发送，不然由于内容太长无法发送出去。
                ArrayList<String> smss = smsManager.divideMessage(content);
for (String string : smss) {
                    smsManager.sendTextMessage(phone, null, string, null, null);
                }
            }
        });
    }
}

• manifest文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dasudian.smssend">
<!--需要添加发送短信的权限，不然程序运行会崩溃 -->
<uses-permission android:name="android.permission.SEND_SMS"/>

<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>

• 布局文件

<?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:orientation="vertical"
tools:context="com.dasudian.smssend.MainActivity">

<EditText
 android:id="@+id/et_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入电话号码"
android:inputType="phone" />

<EditText
 android:id="@+id/et_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="top"
android:hint="请输入短信内容"
android:lines="5" />

<Button
 android:id="@+id/bt_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="发送" />
</LinearLayout>