10.20 groovy寫安卓,如何保存fragment的狀態

groovy寫安卓代碼注意事項:

下載sdk:http://groovy-lang.org/download.html
需要配置:

apply plugin: 'com.android.application'

buildscript { repositories { jcenter() }
    dependencies { classpath 'com.android.tools.build:gradle:1.3.0' classpath 'org.codehaus.groovy:gradle-groovy-android-plugin:0.3.6' }
}
apply plugin: 'groovyx.grooid.groovy-android'


dependencies { compile 'org.codehaus.groovy:groovy:2.4.3:grooid' compile('org.codehaus.groovy:groovy-json:2.4.3') { transitive = false }
}

一個groovy寫的遵循Google Material Design设计原则安卓源代碼
https://github.com/zzhoujay/Gank4Android

參考:
http://m.blog.csdn.net/blog/zhjali123/45128187

Gradle: 错误:编码 GBK 的不可映射字符的解決方案:

在项目下的build.gradle下添加以下代码即可解决

tasks.withType(Compile) {
options.encoding = “UTF-8”
}
Gradle2.0+环境下需将Compile改为JavaCompile

tasks.withType(JavaCompile) {
options.encoding = “UTF-8”
}

Mac下批量将GBK转换UTF-8编码

http://weijun.me/post/develop/2015-07-29
原理:
mac shell
iconv -f GBK -t UTF8 “ path">" {ipath.java_gbk}.java”

中文文字感情分享,java開源庫

https://www.jb51.cc/semanticanalysis
http://git.oschina.net/www.feit.com/SemanticAnalysis
使用方式:

1.自行编译src 或者直接下载dist中的zg-sa.jar
2.需要引用的第三方的包位于lib文件夹中

DEMO:

?
1
2
3
Analysis analysis = new Analysis();
System.out.println(“1: ” + analysis.parse(“这是一个普通评论”).getCode());
System.out.println(“2: ” + analysis.parse(“中国加油!”).getdisplay());
输出

1: 0
2: 正面

正面:1
负面:-1
中性:0

android 6.0 ssl3_get_server_key_exchange:BAD_DH_P_LENGTH

http://bbs.csdn.net/topics/391843187
出現這個原因是因為:
android自家寫的BoringSSL不在支持openssl的漏洞導致logjam attack

保存fragment狀態

activity裡面這樣寫:

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

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.contentContainer,MainFragment.newInstance())
                    .commit();
        }
    }

fragment里面这样写:

Bundle savedState;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
   super.onActivityCreated(savedInstanceState);
   // Restore State Here
   if (!restoreStateFromArguments()) {
      // First Time running,Initialize something here
   }
}
@Override
public void onSaveInstanceState(Bundle outState) {
   super.onSaveInstanceState(outState);
   // Save State Here
   // 這裡是防止旋轉屏幕是出現的狀態丟失問題
   saveStatetoArguments();
}
@Override
public void onDestroyView() {
   super.onDestroyView();
   // Save State Here
   saveStatetoArguments();
}
private void saveStatetoArguments() {
   savedState = saveState();
   if (savedState != null) {
      Bundle b = getArguments();
      b.putBundle(“internalSavedViewState8954201239547”,savedState);
   }
}
private boolean restoreStateFromArguments() {
   Bundle b = getArguments();
   savedState = b.getBundle(“internalSavedViewState8954201239547”);
   if (savedState != null) {
      restoreState();
      return true;
   }
   return false;
}
/////////////////////////////////
// 取出状态数据
/////////////////////////////////
private void restoreState() {
   if (savedState != null) {
      //比如
      //tv1.setText(savedState.getString(“text”));
   }
}
//////////////////////////////
// 保存状态数据
//////////////////////////////
private Bundle saveState() {
   Bundle state = new Bundle();
   // 比如
   //state.putString(“text”,tv1.getText().toString());
   return state;
}

參考:
http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0327/2648.html
http://inthecheesefactory.com/blog/fragment-state-saving-best-practices/en
一個有demo的開源地址:
https://github.com/nuuneoi/StatedFragment

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