簡述

說起Activity推掸，每個(gè)Android開發(fā)人員應(yīng)該都很熟悉熟妓，它是整個(gè)Android application的一個(gè)重要部分。本文主要總結(jié)一下Activity跳轉(zhuǎn)的常用方法豪墅。

1.Intent

a.顯式跳轉(zhuǎn)

/**1. 不帶結(jié)果回調(diào)*/
Intent intent=new Intent(MainActivity.this, SecondActivity.class); 
startActivity(intent);

/**2. 帶結(jié)果回調(diào)*/
Intent intent=new Intent(MainActivity.this, SecondActivity.class); 
startActivityForResult(intent, requestCode);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    //todo 處理跳轉(zhuǎn)頁面返回的結(jié)果
}

b.隱式跳轉(zhuǎn)

在AndroidManifest.xml文件里配置所跳轉(zhuǎn)到Activity的屬性

<activity
    android:name="com.example.android.tst.SecondActivity" 
    android:label="@string/title_activity_main" >
    <intent-filter>
        <action android:name="com.example.android.tst.SecondActivity"/> 
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

在需要跳轉(zhuǎn)的地方寫

Intent intent=new Intent("com.example.android.tst.SecondActivity"); 
startActivity(intent);

2.外部H5頁面啟動(dòng)App

清單文件對應(yīng)Activity配置, 其中host, scheme, path自定義即可

<intent-filter>
      <!--該頁面的路徑配置-->
      <data
           android:host="com.admin.example"
           android:path="/parameter"
           android:scheme="customscheme" />
      <!--下面這幾行也必須得設(shè)置-->
      <category android:name="android.intent.category.DEFAULT" />
      <action android:name="android.intent.action.VIEW" />
      <category android:name="android.intent.category.BROWSABLE" />
</intent-filter>

h5頁面這樣配置

var the_href = "customscheme://com.admin.example/parameter?param1=......"

3.內(nèi)部h5跳轉(zhuǎn)activity

定義一個(gè)類用于js調(diào)用

public class TestInterFace{
    Intent intent = null;
    private Context mContext;
    public TestInterFace(Context context){
        this.mContext = context;
    }

    @JavascriptInterface  //這個(gè)必須加到逊，否則不能調(diào)用
    public  void jump(){
        intent = new Intent(mContext, TestActivity.class);
        startActivity(intent);
    }
}

WebView配置

mWebview.getSettings().setJavaScriptEnabled(true); 
mWebview.loadData("", "text/html", null);
mWebview.addJavascriptInterface(new TestInterFace(WebActivity.this),"test");
mWebview.loadUrl("http://www.baidu.com/");
//設(shè)置不用系統(tǒng)瀏覽器打開,直接顯示在當(dāng)前Webview
mWebview.setWebViewClient(new WebViewClient() {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
          view.loadUrl(url);
          return true;
    }
});

js調(diào)用

<script>
    
    ```
    
    function jumpToAppPages(){
            test.jump();
    }

    ```
</script>

4.反射啟動(dòng)activity

/**className 為對應(yīng)的activity的全路徑*/
public static void startActivity(String className){

    Intent intent = new Intent();
    try {
        Class aClass = Class.forName(className);
        intent.setClass(MyApplication.getInstance(),aClass);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        MyApplication.getInstance().startActivity(intent);
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}