编辑*在
Android设备上测试时发生此问题.在对emultor进行测试时,不会出现此问题.
我正在开始一个新的活动,我看到在onResume被调用后立即调用onPause.如果我查看日志,它会在onResume之后进入Idle.因此在调用onResume之后立即导致onPause.
调用者活动 – 通过意图调用onClick上的MainActivity.
public class TestActivity extends AppCompatActivity implements View.OnClickListener{ String TAG = "acr"; Button testBtn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); testBtn = (Button) findViewById(R.id.testBtn); testBtn.setonClickListener(this); } @Override protected void onPause() { super.onPause(); Log.i(TAG,"on pause called on TestActivity "); } @Override protected void onResume() { super.onResume(); Log.i(TAG,"on resume called on TestActivity "); } @Override public void onClick(View v) { switch(v.getId()){ case R.id.testBtn: Intent mainIntent = new Intent(this,MainActivity.class); TestActivity.this.startActivity(mainIntent); break; } } }
有bug的活动
public class MainActivity extends AppCompatActivity{ public static final String TAG = "acrx"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override protected void onPause() { super.onPause(); Log.i(TAG,"on pause called on mainactivity"); } @Override protected void onResume() { super.onResume(); Log.i(TAG,"on resume Called on Main activity"); } @Override protected void onStop() { super.onStop(); Log.i(TAG,"on stop Called on Main activity"); } }
日志
12-06 23:24:19.751 22983-22983/com.example.m1alesis.smartcardreader I/acrx: on resume Called on Main activity 12-06 23:24:19.751 22983-22983/com.example.m1alesis.smartcardreader D/SecWifidisplayUtil: Metadata value : SecSettings2 12-06 23:24:19.751 22983-22983/com.example.m1alesis.smartcardreader D/ViewRootImpl: #1 mView = com.android.internal.policy.PhoneWindow$DecorView{5ce8491 I.E...... R.....ID 0,0-0,0} 12-06 23:24:19.781 22983-23012/com.example.m1alesis.smartcardreader D/mali_winsys: EGLint new_window_surface(egl_winsys_display*,void*,EGLSurface,EGLConfig,egl_winsys_surface**,egl_color_buffer_format*,EGLBoolean) returns 0x3000,[1440x2560]-format:1 12-06 23:24:19.811 22983-22983/com.example.m1alesis.smartcardreader W/displayListCanvas: displayListCanvas is started on unbinded RenderNode (without mOwningView) 12-06 23:24:19.831 22983-22983/com.example.m1alesis.smartcardreader D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0,96 - 0,0) vi=Rect(0,0) or=1 12-06 23:24:19.871 22983-23012/com.example.m1alesis.smartcardreader D/Openglrenderer: endAllActiveAnimators on 0x7f9c17ec00 (rippledrawable) with handle 0x7f9ccc8b60 12-06 23:24:19.871 22983-22983/com.example.m1alesis.smartcardreader I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@fa2f707 time:376798424 12-06 23:24:20.131 22983-22983/com.example.m1alesis.smartcardreader V/ActivityThread: updateVisibility : ActivityRecord{e78cff6 token=android.os.BinderProxy@a67fd36 {com.example.m1alesis.smartcardreader/com.example.m1alesis.smartcardreader.TestActivity}} show : false 12-06 23:24:31.561 22983-22983/com.example.m1alesis.smartcardreader I/acrx: on pause called on mainactivity 12-06 23:24:31.701 22983-22983/com.example.m1alesis.smartcardreader I/acrx: on resume Called on Main activity 12-06 23:24:31.721 22983-22983/com.example.m1alesis.smartcardreader I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@fa2f707 time:376810271
解决方法
我在我的测试活动中尝试了它,但我没有得到你的问题.我的MainActivity和TestActivity上只有一个按钮.
我在这里找到了一些东西:Pausing and Resuming an Activity.
这是有趣的部分:
Note: When the system calls your activity’s onPause() method,the system may be signaling that the activity will be paused for a moment and the user may return focus to your activity,or that the app is running in multi-window mode. However,this method call may also be the first indication that the user is leaving your activity.
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