我想從一個活動發送一個捆綁到另一個。當我在接收活動中加載包時,所有信息似乎都是空的。下面是一些代碼:Android如何將捆綁包發送到其他活動?
BaseActivity.java
private final DrawerLayout.DrawerListener mDrawerListener = new DrawerLayout.DrawerListener() {
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
if (mDrawerToggle != null) mDrawerToggle.onDrawerSlide(drawerView, slideOffset);
}
@Override
public void onDrawerOpened(View drawerView) {
if (mDrawerToggle != null) {
mDrawerToggle.onDrawerOpened(drawerView);
}
if (getSupportActionBar() != null) getSupportActionBar().setTitle(R.string.app_name);
}
@Override
public void onDrawerClosed(View drawerView) { // 사이드 바에서 선택한 리스트 동작
if (mDrawerToggle != null) mDrawerToggle.onDrawerClosed(drawerView);
if (mItemToOpenWhenDrawerCloses >= 0) {
Bundle extras = ActivityOptions.makeCustomAnimation(
BaseActivity.this, R.anim.fade_in, R.anim.fade_out).toBundle();
Bundle mediaExtras = new Bundle();
Class activityClass = null;
switch (mItemToOpenWhenDrawerCloses) {
case R.id.navigation_allmusic:
activityClass = MusicPlayerActivity.class;
break;
case R.id.navigation_album:
mediaExtras.putString(SAVED_MEDIA_ID, MEDIA_ID_MUSICS_BY_ALBUM);
Log.d("123qwer", "onDrawerClosed, mediaExtras -> " + SAVED_MEDIA_ID + " " + MEDIA_ID_MUSICS_BY_ALBUM);
activityClass = MusicPlayerActivity.class;
break;
case R.id.navigation_playlists:
//TODO:add class later
// activityClass = PlaceholderActivity.class;
break;
}
if (activityClass != null) {
setBundleInfo(mediaExtras);
startActivity(new Intent(BaseActivity.this, activityClass).putExtras(mediaExtras), extras);
finish();
}
}
}
@Override
public void onDrawerStateChanged(int newState) {
if (mDrawerToggle != null) mDrawerToggle.onDrawerStateChanged(newState);
}
};
MusicPlayerActivity.java
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initializedToolbar();
Log.d("123qwer", "Get Bundle Test " + this.getIntent().getExtras().getString(SAVED_MEDIA_ID));
initializeFromParams(savedInstanceState, getIntent());
}
我要發送的mediaExtras捆綁在BaseActivity類到另一個活動時,我點擊一些按鈕。你可以在BaseActivity中看到這個部分。
case R.id.navigation_album:
mediaExtras.putString(SAVED_MEDIA_ID, MEDIA_ID_MUSICS_BY_ALBUM);
Log.d("123qwer", "onDrawerClosed, mediaExtras -> " + SAVED_MEDIA_ID + " " + MEDIA_ID_MUSICS_BY_ALBUM);
activityClass = MusicPlayerActivity.class;
break;
我試圖把字符串信息放到mediaExtras中。但是,當我試圖得到這個,我剛剛得到一個空值。
this.getIntent().getExtras().getString(SAVED_MEDIA_ID)
請告訴我該怎麼解決呢
可能重複[Android \ _如何發送捆綁到其他活動?](http://stackoverflow.com/questions/37799762/android-how-can-i-send-a-bundle-to -otherother-activity) – Arjan
這行是否打印在logcat上? 'Log.d(「123qwer」,「onDrawerClosed,mediaExtras - >」+ SAVED_MEDIA_ID +「」+ MEDIA_ID_MUSICS_BY_ALBUM);' –
你是什麼意思'... putExtras(mediaExtras),extras)'? 'mediaExtras'和'extras'都是Bundle對象。使用一個鍵作爲putExtras中的第一個參數來添加Bundle in Intent,然後使用相同的鍵在下一個活動中訪問Bundle –