Android问题解决和代码片段

https://blog.csdn.net/qq_43133135/article/details/113199592 Android Studio安装教程（最新，最全，最详细，图超多）
https://cloud.tencent.com/developer/article/1743279 Android Studio使用USB真机调试详解
https://developer.android.com/studio/releases/platforms?hl=zh-cn SDK 平台版本说明 Android开发SDK版本号和API level对照表

1. 安装，记得配置: idea.config.path=D:\\Dev\\Tools\\android_studio_config

2. Android开发无法连接dl.google.com问题 https://www.jianshu.com/p/147081e7bc06

3. 增加到PATH = D:\Dev\Tools\Android_SDK\platform-tools

4. 无线： https://zhuanlan.zhihu.com/p/336660319
adb pair 192.168.0.113:42035 ，输入配对码。这个ip到手机的无线调试，使用配对码配对设备，会显示出来。
然后到andorid studio，下拉设备下拉框，选择Device Manager—Physical–Pair using Wi-Fi
最后能在Available Wi-Fi devices看到，点后面的pair按钮，输入手机上的验证码。

模块的 build.gradle

//引入butterknife

implementation 'com.jakewharton:butterknife:10.2.3'

annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.3'

//引入XUI

implementation 'com.github.xuexiangjys:XUI:1.1.8'

//引入fastjson

implementation 'com.alibaba:fastjson:1.2.79'

编译控制台乱码: Android Studio Build Output 栏内汉字出现乱码的解决方案 https://blog.csdn.net/zhang5690800/article/details/104502632

引入XUI

settings.gradle

1. 在 settings.gradle 加入一下内容：

dependencyResolutionManagement {

repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)

repositories {

......

// 阿里镜像

maven { url 'https://maven.aliyun.com/repository/google' }

maven { url 'https://maven.aliyun.com/repository/public' }

maven { url 'https://maven.aliyun.com/repository/gradle-plugin' }

......

// JitPack 远程仓库：https://jitpack.io

maven { url 'https://jitpack.io' }

......

jcenter() // Warning: this repository is going to shut down soon

}

2. 在工程模块下面的build.gradle，加入一下内容：

dependencies {

......

implementation 'com.github.xuexiangjys:XUI:1.1.8'

......

}

3. 更改主题：

<item name="colorPrimary">@color/colorPrimary</item>

<item name="colorPrimaryDark">@color/colorPrimaryDark</item>

<item name="colorAccent">@color/colorAccent</item>

</style>

也可以在代码初始化：

@Override

protected void onCreate(Bundle savedInstanceState) {

XUI.initTheme(this);

super.onCreate(savedInstanceState);

...

}

如何确定Android设备唯一识别码 https://www.jianshu.com/p/52e14654e842

/**

* 自 Android 10（API 级别 29）起，您的应用必须是设备或个人资料所有者应用，

* 具有特殊运营商许可，或具有 READ_PRIVILEGED_PHONE_STATE 特权，

* 才能访问不可重置的设备标识符

* @return

private String getDeviceId() {

String deviceCode = null;

if (Build.VERSION.SDK_INT > 28) {

deviceCode = Settings.System.getString(this.getContentResolver(), Settings.Secure.ANDROID_ID);

} else {

TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);

deviceCode = tm.getDeviceId();

}

return deviceCode;

}

/**

* 获得Android标志

* @return

private String getAndroid(){

String androidId = Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID);

return androidId;

}

Layout的标签

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"

Shape参数说明

<?xml version="1.0" encoding="utf-8"?>

<shape

xmlns:android="http://schemas.android.com/apk/res/android"

android:shape=["rectangle" | "oval" | "line" | "ring"] >

<corners

android:radius="integer"

android:topLeftRadius="integer"

android:topRightRadius="integer"

android:bottomLeftRadius="integer"

android:bottomRightRadius="integer" />

<gradient

android:angle="integer"

android:centerX="integer"

android:centerY="integer"

android:centerColor="integer"

android:endColor="color"

android:gradientRadius="integer"

android:startColor="color"

android:type=["linear" | "radial" | "sweep"]

android:useLevel=["true" | "false"] />

<padding

android:left="integer"

android:top="integer"

android:right="integer"

android:bottom="integer" />

<size

android:width="integer"

android:height="integer" />

<solid

android:color="color" />

<stroke

android:width="integer"

android:color="color"

android:dashWidth="integer"

android:dashGap="integer" />

</shape>

StateListDrawable参数说明 https://www.twle.cn/l/yufei/android/android-basic-button.html

控件的背景样式 https://www.twle.cn/l/yufei/android/android-basic-textview3.html

<?xml version="1.0" encoding="utf-8"?>

<!--<gradient

android:angle="270"

android:endColor="@color/red"

android:startColor="@color/green" />-->

<stroke

android:width="2px"

android:color="@color/c000dff" />

<corners

android:bottomLeftRadius="15px"

android:bottomRightRadius="15px"

android:topLeftRadius="15px"

android:topRightRadius="15px" />

<padding

android:bottom="5dp"

android:left="5dp"

android:right="5dp"

android:top="5dp" />

</shape>

按钮的状态背景样式 https://www.twle.cn/l/yufei/android/android-basic-button.html

//dimens.xml

//colors.xml

//button_rounded.xml

<?xml version="1.0" encoding="utf-8"?>

<shape>

<!--<gradient

android:angle="270"

android:endColor="@color/red"

android:startColor="@color/green" />-->

</shape>

</item>

<shape>

</shape>

</item>

<item>

<shape>

</shape>

</item>

</selector>

自定义控件之 Android 事件机制 – 回调 https://www.twle.cn/l/yufei/android/android-basic-event-callback.html

自定义控件 WebView https://www.twle.cn/l/yufei/android/android-basic-webview-scrollby.html

android:layout_gravity 和 android:gravity 的区别 https://www.cnblogs.com/ghj1976/archive/2011/04/26/2029535.html

Activity 数据传递，多个 Activity 间的交互，关闭所有 Activity，完全退出，双击返回键退出程序，Activity 转场动画，Bundle 传递数据的限制，设置 Activity 全屏，定义对话框 ( Dialog ) 风格 https://www.twle.cn/l/yufei/android/android-basic-activity-start.html

TextView 边框 https://www.twle.cn/l/yufei/android/android-basic-textview3.html

Android Activity 数据传递 https://www.twle.cn/l/yufei/android/android-basic-activity-start.html

Intent intent = new Intent(MainActivity.this, T1Activity.class);

intent.putExtra("key1","这是我的值111");

intent.putExtra("key2",1000);

startActivity(intent);

Intent intent = new Intent(MainActivity.this, T1Activity.class);

Bundle bundle = new Bundle();

bundle.putString("key1","这是我的值222");

bundle.putInt("key2",2000);

intent.putExtras(bundle);

startActivity(intent);

Android Intent 传递简单数据 https://www.twle.cn/l/yufei/android/android-basic-intent-simple.html

Android Intent 传递数组 https://www.twle.cn/l/yufei/android/android-basic-intent-array.html

Android Intent 传递集合 https://www.twle.cn/l/yufei/android/android-basic-intent-set.html

Android Intent 传递对象 https://www.twle.cn/l/yufei/android/android-basic-intent-object.html

Android Intent 传参 – Application 对象 https://www.twle.cn/l/yufei/android/android-basic-intent-global.html

android webview中视频播放及全屏(成功) https://www.jianshu.com/p/54ac34790db0

Android VideoView播放视频全屏 https://blog.csdn.net/qq_31939617/article/details/103627295

ExoPlayer的简单使用 https://www.jianshu.com/p/1851e9287d22

ExoPlayer详解（官方文档-入门） https://blog.csdn.net/qq_35864421/article/details/115345091

ExoPlayer最新文档 https://exoplayer.dev/hello-world.html

ExoPlayer简单使用 https://www.jianshu.com/p/6e466e112877

Android视频播放器ExoPlayer全屏 https://blog.csdn.net/greatyoulv/article/details/104023467

iPlayer 播放器 https://gitee.com/hty_Yuye/iPlayer

EditText android:inputType 值列表 https://www.twle.cn/l/yufei/android/android-basic-edittext3.html

按钮状态背景 https://www.twle.cn/l/yufei/android/android-basic-button.html

按钮圆角： https://www.twle.cn/l/yufei/android/android-basic-button.html

Button 按钮自制水波效果 https://www.twle.cn/l/yufei/android/android-basic-button2.html Java代码实现

Android ProgressBar 自定义圆环进度条 https://www.twle.cn/l/yufei/android/android-basic-progressbar-custom.html

Android Adapter 适配器 https://www.twle.cn/l/yufei/android/android-basic-adapter.html

android中利用线程handler改变textView的内容 https://blog.csdn.net/hxy19971101/article/details/72684740

new Runnable() {

@Override

public void run() {

textView1.setText(chronometer.getText() + "\n" + textView1.getText());

}

}.run();

android进行异步更新UI的四种方式 https://segmentfault.com/a/1190000003702775

//1.使用Handler消息传递机制

new Handler(){

@Override

public void handleMessage(@NonNull Message msg) {

super.handleMessage(msg);

System.out.println("msg=" + msg.what);

textView1.setText("1.使用Handler消息传递机制: "+chronometer.getText());

}

}.sendEmptyMessage(888);

//2. 使用AsyncTask异步任务，官方新API已经标记过时

new AsyncTask<String,String,String>(){

@Override

protected String doInBackground(String... strings) {

return null;

}

@Override

protected void onPostExecute(String s) {

super.onPostExecute(s);

textView2.setText("2. 使用AsyncTask异步任务: "+chronometer.getText());

}

}.execute();

//3. 使用runOnUiThread(action)方法:

new Thread(){

@Override

public void run() {

super.run();

runOnUiThread(new Runnable() {

@Override

public void run() {

textView3.setText("3. 使用runOnUiThread(action)方法: "+chronometer.getText());

}

});

}

}.start();

//4. 使用Handler的post(Runnabel r)方法

new Handler().post(new Runnable() {

@Override

public void run() {

textView4.setText("4. 使用Handler的post(Runnabel r)方法: "+chronometer.getText());

}

});

//5. 使用Runnable方法

new Runnable() {

@Override

public void run() {

textView5.setText("5. 使用Runnable方法: "+chronometer.getText());

}

}.run();

对话框：很详细例子 https://www.twle.cn/l/yufei/android/android-basic-alertdialog.html 使用适配器参考: https://blog.csdn.net/sandalphon4869/article/details/100153479

//普通对话框

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);

builder.setIcon(R.drawable.a1)

.setTitle("系统提示")

.setMessage("这是一个最普通的 AlertDialog,\n带有三个按钮，分别是取消，普通和确定");

// 取消按钮

builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(MainActivity.this, "你点击了取消按钮~", Toast.LENGTH_SHORT).show();

}

});

// 确定按钮

builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(MainActivity.this, "你点击了确定按钮~", Toast.LENGTH_SHORT).show();

}

});

// 普通按钮

builder.setNeutralButton("普通按钮", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(MainActivity.this, "你点击了普通按钮~", Toast.LENGTH_SHORT).show();

}

});

AlertDialog dialog = builder.create(); // 创建 AlertDialog 对象

dialog.show(); // 显示对话框

//设定样式，只能通过代码

// 必须在对话框上调用show（）才能访问按钮，这些按钮事先不可用

dialog.getButton(AlertDialog.BUTTON_POSITIVE).setBackground(

ContextCompat.getDrawable(MainActivity.this, R.drawable.button_rounded)

);

dialog.getButton(AlertDialog.BUTTON_NEGATIVE).setBackground(

ContextCompat.getDrawable(MainActivity.this, R.drawable.button_rounded)

);

dialog.getButton(AlertDialog.BUTTON_NEUTRAL).setBackground(

ContextCompat.getDrawable(MainActivity.this, R.drawable.button_rounded)

);

日期选择

Calendar cale1 = Calendar.getInstance();

DatePickerDialog datePickerDialog = new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {

@Override

public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {

String str = "你选择的是 " + year + "年" + (monthOfYear + 1) + "月" + dayOfMonth + "日";

Log.d(msg, "信息是:" + str);

Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();

}

}, cale1.get(Calendar.YEAR), cale1.get(Calendar.MONTH), cale1.get(Calendar.DAY_OF_MONTH));

datePickerDialog.show();

datePickerDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setBackground(

ContextCompat.getDrawable(MainActivity.this, R.drawable.button_rounded)

);

datePickerDialog.getButton(AlertDialog.BUTTON_POSITIVE).setBackground(

ContextCompat.getDrawable(MainActivity.this, R.drawable.button_rounded)

);

Android ActionBar和ToolBar的使用 https://www.jianshu.com/p/81d0bcb282cb

菜单OptionMenu https://www.twle.cn/l/yufei/android/android-basic-menu.html

ContextMenu 上下文菜单 https://www.twle.cn/l/yufei/android/android-basic-contextmenu.html

PopupMenu 弹出菜单 https://www.twle.cn/l/yufei/android/android-basic-popupmenu.html

DrawerLayout 侧滑菜单 https://www.twle.cn/l/yufei/android/android-basic-drawerlayout.html

DrawerLayout 左右侧滑菜单 https://www.twle.cn/l/yufei/android/android-basic-drawerlayout2.html

res\menu\main_optionmenu.xml

<?xml version="1.0" encoding="utf-8"?>

<item android:id="@+id/create"

android:title="新建" />

<item android:id="@+id/edit"

android:title="编辑" />

<item android:id="@+id/save"

android:title="保存" />

<item android:id="@+id/save_as"

android:title="另存为..." />

<item android:id="@+id/help"

android:title="帮助" />

</menu>

...

// 1. 定义菜单项的标识

final private int OPEN = 111;

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// 加载 XML 菜单目录

getMenuInflater().inflate(R.menu.main_optionmenu, menu);

menu.add(1,OPEN,0,"打开");

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

// 菜单项被选中时触发

int id = item.getItemId();

String label = "";

Log.d("OptionMenu",String.valueOf(id));

switch (id){

case R.id.create:

label = "新建";

break;

case OPEN:

label = "打开";

break;

case R.id.help:

label = "帮助";

break;

}

Toast.makeText(getApplicationContext(),"你点击了:" + label,Toast.LENGTH_SHORT).show();

return super.onOptionsItemSelected(item);

}

定时器

//使用定时器,每隔 100 毫秒让 handler 发送一个空信息

new Timer().schedule(new TimerTask() {

@Override

public void run() {

myHandler.sendEmptyMessage(0x123);

}

}, 0,200);

Activity 状态保存横竖屏自动切换 https://www.twle.cn/l/yufei/android/android-basic-activity-savestate.html

Activity间和Fragment间的数据传递—使用Bundle https://blog.csdn.net/qunqunstyle99/article/details/82026124

WebView错误 net::ERR_CLEARTEXT_NOT_PERMITTED

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.example.test.myapplication">

<uses-permission android:name="android.permission.INTERNET" />

<application

......

android:usesCleartextTraffic="true"

......

</application>

</manifest>

WebView 问题解决：

Android WebView 使用 https://www.twle.cn/l/yufei/android/android-basic-webview.html

Webview加载界面白屏解决方法总结 https://www.cxymm.net/article/qq_34584049/78280815

解决页面退出 WebView 继续播放视频音乐的问题 https://blog.csdn.net/yy1300326388/article/details/72466875

Android-VideoView播放网络视频 m3u8格式 https://blog.csdn.net/qq_41113081/article/details/86689388

VideoView全屏视频播放 https://blog.csdn.net/kingroc/article/details/51108587

VideoView 视频播放完成例子（进度条，播放时间，暂停，拖动） https://cloud.tencent.com/developer/article/1361737

Android高版本联网失败报错:Cleartext HTTP traffic to xxx not permitted解决方法 https://blog.csdn.net/gengkui9897/article/details/82863966

Android 显示、隐藏状态栏和导航栏 https://www.jianshu.com/p/e9e443271c98

AlertDialog的按钮样式

// 调用 show()方法后得到 dialog对象

AlertDialog dialog = builder.show();

final Button positiveButton = dialog.getButton(AlertDialog.BUTTON_POSITIVE);

final Button negativeButton=dialog.getButton(AlertDialog.BUTTON_NEGATIVE);

LinearLayout.LayoutParams positiveParams =(LinearLayout.LayoutParams)positiveButton.getLayoutParams();

positiveParams.gravity = Gravity.CENTER;

positiveParams.setMargins(10,10,10,10);

positiveParams.width = 0;

// 安卓下面有三个位置的按钮，默认权重为 1,设置成 500或更大才能让两个按钮看起来均分

positiveParams.weight = 500;

LinearLayout.LayoutParams negativeParams =(LinearLayout.LayoutParams)negativeButton.getLayoutParams();

negativeParams.gravity = Gravity.CENTER;

negativeParams.setMargins(10,10,10,10);

negativeParams.width = 0;

negativeParams.weight = 500;

positiveButton.setLayoutParams(positiveParams);

negativeButton.setLayoutParams(negativeParams);

positiveButton.setBackgroundColor(Color.parseColor("#FF733E"));

positiveButton.setTextColor(Color.parseColor("#FFFFFF"));

negativeButton.setBackgroundColor(Color.parseColor("#DDDDDD"));

Android禁止锁屏，保持常亮方法 https://blog.csdn.net/qq_17766199/article/details/50118291

ListView的滚动监听–AbsListView.OnScrollListener的学习 https://www.jianshu.com/p/0b731f38120e

Textview 文本旋转，倾斜 https://blog.csdn.net/u014649598/article/details/45563723

Android之网络图片加载的5种基本方式 https://blog.csdn.net/DickyQie/article/details/59146221

如何设置WebView支持js的Alert,Confirm,Prompt函数的弹出提示框 https://blog.csdn.net/mChenys/article/details/49930739

Android中下载apk文件并安装 : https://blog.csdn.net/zhaihaohao1/article/details/81808902

Android 创建文件夹失败（File.mkdirs()） https://www.jianshu.com/p/cd9d45afaddb

解决Android 7.0及以上版本文件暴露异常exposed beyond app through Intent.getData()的方法 https://www.codeleading.com/article/24892804593/

在WebView中获取网页源码 https://blog.csdn.net/qq_32452623/article/details/52182964 https://www.jianshu.com/p/04a0e30771f4

Android 显示、隐藏状态栏和导航栏 https://www.jianshu.com/p/c545b1496c5e

不静之心

Android问题解决和代码片段

发表评论取消回复

访问信息

功能

近期评论

不静之心

Android问题解决和代码片段

发表评论 取消回复

访问信息

功能

近期评论

发表评论取消回复