有时会发生错误（实际上经常发生）。
A/libc: Fatal signal 11 (SIGSEGV) at 0x830ab2cc (code=1), thread 24294 (Thread-1174)
代码如下：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.displaygraph);
Intent intent = getIntent();
GraphView graph = (GraphView) findViewById(R.id.graph);
series = new LineGraphSeries<DataPoint>();
graph.addSeries(series);
Viewport viewport = graph.getViewport();
viewport.setYAxisBoundsManual(true);
viewport.setXAxisBoundsManual(true);
viewport.setMinY(0);
double max=data[0];
for (int i = 0; i < data.length; i++) {
if (data[i] > max) {
max = data[i];
Log.w(TAG,"max"+max);
}
}
viewport.setMaxY(max);
viewport.setMinX(0);
viewport.setMaxX(450);
graph.getViewport().setScalable(true);
graph.getViewport().setScalableY(true);
seriesecg = new LineGraphSeries<DataPoint>();
GraphView graphecg = (GraphView) findViewById(R.id.graphecg);
graphecg.addSeries(seriesecg);
Viewport viewportecg = graphecg.getViewport();
viewportecg.setYAxisBoundsManual(true);
viewportecg.setXAxisBoundsManual(true);
viewportecg.setMinY(0);
viewportecg.setMaxY(3000);
viewportecg.setMinX(0);
viewportecg.setMaxX(450);
graphecg.getViewport().setScalable(true);
graphecg.getViewport().setScalableY(true);
}
@Override
protected void onResume() {
super.onResume();
new Thread(new Runnable() {
@Override
public void run() {
// we add 450 new entries
for (int i = 0; i <= 449; i++) {
final int finalI = i;
final int finalII = i;
Log.w(TAG, "finalI"+finalI);
runOnUiThread(new Runnable() {
@Override
public void run() {
addEntry(finalI,ppg);
}
});
// sleep to slow down the add of entries
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// manage error ...
}
}
}
}).start();
}
// add random data to graph
private void addEntry(int i,double[] data) {
if(i<=449) {
Log.w(TAG, "ppg" + data[i]+"/"+i);
series.appendData(new DataPoint(i, data[i]), false, 450);
}
}
logcat如下：
01-22 19:27:01.650 1041-1370/? I/KeyguardUpdateMonitor: visibility is same
01-22 19:27:01.650 818-818/? D/CrashAnrDetector: Build: samsung/lt03ltezs/lt03lte:4.4.2/KOT49H/P605ZSUCOD1:user/release-keys
Hardware: MSM8974
Revision: 11
Bootloader: P605ZSUCOD1
Radio: unknown
Kernel: Linux version 3.4.0-4665213 (dpi@SWDD5621) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Mon Apr 13 11:19:19 KST 2015
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'samsung/lt03ltezs/lt03lte:4.4.2/KOT49H/P605ZSUCOD1:user/release-keys'
Revision: '11'
pid: 12476, tid: 12476, name: elerometergraph >>> com.android.accelerometergraph <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 82f5583c
r0 402aaedb r1 82f55838 r2 402aaed8 r3 42caa968
r4 bedfd1b8 r5 42277008 r6 bedfd20c r7 402aaaa8
r8 00000000 r9 42caad98 sl 416b049c fp 80000000
ip 00000003 sp bedfd010 lr 4172ff51 pc 4172ff3e cpsr 900f0030
d0 0080000000001000 d1 0200000000004000
d2 0000000000000008 d3 0000888800000000
d4 0000004080000000 d5 0000200000000000
d6 1000000000200000 d7 0000800000000010
d8 44618b1844624bf2 d9 3e99999a4040da00
d10 43380000c3892666 d11 c389266644618b18
d12 4252ccd044624bf2 d13 c07124cccccccccd
d14 4034000000000000 d15 43a38000c3892666
d16 0100000000000000 d17 0004400000020000
d18 0004400000000000 d19 2000010000440000
d20 000a402000088100 d21 0000000000044000
d22 0022000000008800 d23 1100000000000000
d24 3fd1b10853a79915 d25 3fd554fa9ca0567a
d26 3fdb6db71408e660 d27 3fe33333332d4313
d28 3ff0000000000000 d29 0000000000000001
d30 4059000000000000 d31 4024000000000000
scr 20000013
backtrace:
#00 pc 00075f3e /system/lib/libdvm.so (mspace_bulk_free+89)
#01 pc 00076e63 /system/lib/libdvm.so (dvmHeapSourceFreeList(unsigned int, void**)+70)
#02 pc 0003a7b4 /system/lib/libdvm.so
#03 pc 0002c4ec /system/lib/libdvm.so (dvmHeapBitmapSweepWalk(HeapBitmap const*, HeapBitmap const*, unsigned int, unsigned int, void (*)(unsigned int, void**, void*), void*)+176)
#04 pc 0003b53c /system/lib/libdvm.so (dvmHeapSweepUnmarkedObjects(bool, bool, unsigned int*, unsigned int*)+284)
#05 pc 0002c94c /system/lib/libdvm.so (dvmCollectGarbageInternal(GcSpec const*)+452)
#06 pc 0002d45c /system/lib/libdvm.so (dvmMalloc(unsigned int, int)+356)
#07 pc 0006cb03 /system/lib/libdvm.so
#08 pc 0002c36f /dev/ashmem/dalvik-jit-code-cache (deleted)
stack:
bedfcfd0 bedfd1ec [stack]
bedfcfd4 40129d5d /system/lib/libc.so (realloc+12)
bedfcfd8 00000008
bedfcfdc bedfd2a8 [stack]
bedfcfe0 78e476f8
bedfcfe4 00000000
bedfcfe8 00000003
bedfcfec bedfd100 [stack]
bedfcff0 42ca9b88 /dev/ashmem/dalvik-heap (deleted)
bedfcff4 bedfd174 [stack]
bedfcff8 42277008 /dev/ashmem/dalvik-heap (deleted)
bedfcffc bedfd20c [stack]
bedfd000 42caa968 /dev/ashmem/dalvik-heap (deleted)
bedfd004 00000000
bedfd008 42caa950 /dev/ashmem/dalvik-heap (deleted)
bedfd00c 4172ff51 /system/lib/libdvm.so (mspace_bulk_free+108)
#00 bedfd010 00029864
bedfd014 416b0438
bedfd018 00000065
bedfd01c 00000065
bedfd020 bedfd078 [stack]
bedfd024 416b0438
bedfd028 42277008 /dev/ashmem/dalvik-heap (deleted)
bedfd02c 41730e67 /system/lib/libdvm.so (dvmHeapSourceFreeList(unsigned int, void**)+74)
#01 bedfd030 00000065
bedfd034 402abf98 /system/lib/libandroidfw.so
bedfd038 bedfd2cc [stack]
bedfd03c bedfd2cc [stack]
bedfd040 00000065
bedfd044 61fff040 /dev/ashmem/dalvik-bitmap-2 (deleted)
bedfd048 617ff040 /dev/ashmem/dalvik-bitmap-1 (deleted)
bedfd04c 0001acbf
bedfd050 bedfd078 [stack]
bedfd054 416f47b8 /system/lib/libdvm.so
#02 bedfd058 00000000
bedfd05c 00000000
bedfd060 00000030
bedfd064 00015010
bedfd068 01501
01-22 19:27:01.650 818-818/? D/CrashAnrDetector: processName:com.android.accelerometergraph
01-22 19:27:01.650 818-818/? D/CrashAnrDetector: broadcastEvent : com.android.accelerometergraph SYSTEM_TOMBSTONE
01-22 19:27:01.660 1041-1055/? D/KeyguardUpdateMonitor: sendKeyguardVisibilityChanged(true)
01-22 19:27:01.660 1041-1055/? I/KeyguardUpdateMonitor: visibility is same
有时代码有效，但有时它不会......但是当它发生时，它会在i的值达到449之前这样做。我认为它与我的jni代码有关。但在评论并删除所有会调用c代码的内容后，错误仍然存在。
感谢您的帮助......