前言
最近在研究jsbridge, 一直在想怎么樣才能讓需要startActivityForResult比如打開相機拍照這樣的操作在webView中能更簡單一點, 直到我發現了這篇文章
看了之后, 馬上模仿了文中的代碼實現了一下.
Fragment:
public class OnActResultEventDispatcherFragment extends Fragment{ public static final String TAG = "on_act_result_event_dispatcher"; public int mRequestCode = 0x11; private SparseArray<ActResultRequest.Callback> mCallbacks = new SparseArray<>(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRetainInstance(true); } public void startForResult(Intent intent, ActResultRequest.Callback callback) { // mRequestCode與callback需要一一對應 mCallbacks.put(mRequestCode, callback); startActivityForResult(intent, mRequestCode); mRequestCode++; } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); ActResultRequest.Callback callback = mCallbacks.get(requestCode); mCallbacks.remove(requestCode); if (callback != null) { callback.onActivityResult(resultCode, data); } }}ActResultRequest:
public class ActResultRequest { private OnActResultEventDispatcherFragment fragment; public ActResultRequest(FragmentActivity activity) { fragment = getEventDispatchFragment(activity); } private OnActResultEventDispatcherFragment getEventDispatchFragment(FragmentActivity activity) { FragmentManager fragmentManager = activity.getSupportFragmentManager(); OnActResultEventDispatcherFragment fragment = findEventDispatchFragment(fragmentManager); if (fragment == null) { fragment = new OnActResultEventDispatcherFragment(); fragmentManager .beginTransaction() .add(fragment, OnActResultEventDispatcherFragment.TAG) .commitAllowingStateLoss(); fragmentManager.executePendingTransactions(); } return fragment; } private OnActResultEventDispatcherFragment findEventDispatchFragment(FragmentManager manager) { return (OnActResultEventDispatcherFragment) manager.findFragmentByTag(OnActResultEventDispatcherFragment.TAG); } public void startForResult(Intent intent, Callback callback) { fragment.startForResult(intent, callback); } public interface Callback { void onActivityResult(int resultCode, Intent data); }}MainActivity:
public class MainActivity extends AppCompatActivity { private static final String TAG = "MainActivity"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void start(View view) { Intent intent = new Intent(this, SecondActivity.class); ActResultRequest request = new ActResultRequest(this); request.startForResult(intent, new ActResultRequest.Callback() { @Override public void onActivityResult(int resultCode, Intent data) { Log.d(TAG, "resultCode = " + resultCode); String name = data.getStringExtra("name"); Log.d(TAG, "name = " + name); Toast.makeText(MainActivity.this, "name = " + name + ", resultCode = " + resultCode, Toast.LENGTH_SHORT).show(); } }); }}SecondActivity
public class SecondActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_second); } public void returnResult(View view) { Intent intent = new Intent(); intent.putExtra("name", "mundane"); setResult(RESULT_OK, intent); finish(); }}按照這樣的思路, 如果需要簡化jsbridge中startActivityForResult的操作, 我們只需要把Fragment和WebView綁定在一起.比如給這個Fragment取名叫WebViewFragment, 它的布局中只有一個我們封裝好的WebView, 這個WebView需要監聽jsbridge的所有事件我們都在fragment中寫好, 包括onActivityResult中的事件, 當然也可以在這個fragment中用一個專門的管理類來管理注冊的事件.以后Activity中有用到WebView的地方我們就直接用這個WebViewFragment就好了.也就是說, 把這個WebViewFragment, 當成我們之前的WebView.
github地址:
EasyOnActivityResult
總結
以上就是這篇文章的全部內容了，希望本文的內容對大家的學習或者工作具有一定的參考學習價值，如果有疑問大家可以留言交流，謝謝大家對VEVB武林網的支持。
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