Question

我正在开发与健康相关的应用。在ListView我想为每个项目分配值。例如，milk包含21 calories，因此我想将21分配给ListView项milk。

以下是我的活动代码，其中包含ListView。

public class FoodEntry extends AppCompatActivity {

// Array of strings...
String[] food = {"Naan","Pav bhaji","chole tikiya", "rice", "soybean", "milk", "curd"};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_food_entry);

    ArrayAdapter adapter = new ArrayAdapter<>(this, R.layout.activity_item, food);
    ListView listViewFoodItems = (ListView)findViewById(R.id.listViewFood);
    listViewFoodItems.setAdapter(adapter);
}
}

Answer 1

而不是使用String []存储您的数据，就像您在这里一样：

// Array of strings...
String[] food = {"Naan","Pav bhaji","chole tikiya", "rice", "soybean", "milk", "curd"};

使用新对象，例如CalorieCount。

// Array of CalorieCount
CalorieCount[] food = { new CalorieCount("Naan", 20) ... };

Answer 2

您可以将Incident Identifier: 8B05FEB7-F7A7-4399-A735-7BE1F7D6B28C CrashReporter Key: c61d3329a1a016eb2f279bdb36b2c6441c3359b4 Hardware Model: iPhone7,2 Process: xxxapp [469] Path: /private/var/mobile/Containers/Bundle/Application/84A5A17B-D548-4182-B11F-D5F748B88B1C/MMBRevisioniTestTarga.app/MMBRevisioniTestTarga Identifier: xxx.app Version: 108 (1.0) Code Type: ARM-64 (Native) Parent Process: launchd [1] Date/Time: 2016-05-02 13:31:22.22 +0200 Launch Time: 2016-05-02 09:48:02.02 +0200 OS Version: iOS 9.2.1 (13D15) Report Version: 105 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000012e1af30 Triggered by Thread: 0 Filtered syslog: None found Global Trace Buffer (reverse chronological seconds): 1.099550 AppleJPEG 0x000000018210ab54 [0x12d920e00] Releasing session 1.530599 AppleJPEG 0x000000018210ab54 [0x12e215800] Releasing session 1.535648 AppleJPEG 0x000000018210ab54 [0x12d94e200] Releasing session 1.541815 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12eb81731) failed 1.546529 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d73d581) failed 1.546672 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d57af01) failed 1.547266 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d5f6481) failed 1.551646 AppleJPEG 0x000000018210cff4 [0x12d94e200] Decoding completed without errors 1.551646 AppleJPEG 0x000000018210b18c [0x12d94e200] Options: 320x86 [FFFFFFFF,FFFFFFFF] 0001D060 1.551646 AppleJPEG 0x000000018210b044 [0x2d94e200] Decoding: 1 0x000000C0 0x01400056 0x0028304A 0x11111100 0 1.552181 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d7399e1) failed 1.553200 AppleJPEG 0x000000018210a338 [0x12d94e200] Created session 1.555675 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d7a9521) failed 1.557307 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e8d3e31) failed 1.557582 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d7b4c51) failed 1.559249 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e8f1191) failed 1.560348 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e8848f1) failed 1.597807 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e8ce201) failed 1.599417 AppleJPEG 0x000000018210a338 [0x2e215800] Created session 1.614643 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d7845c1) failed 4.189911 AppleJPEG 0x000000018210a338 [0x12d920e00] Created session 13.027686 AppleJPEG 0x000000018210ab54 [0x12d8aee00] Releasing session 13.038310 AppleJPEG 0x000000018210ab54 [0x12d920800] Releasing session 13.038310 AppleJPEG 0x000000018210a338 [0x12d920800] Created session 13.038310 AppleJPEG 0x000000018210a338 [0x12d8aee00] Created session 13.602625 CFNetwork 0x000000018107d84c TCP Conn 0x12d5fb2d0 SSL Handshake DONE 13.751047 CFNetwork 0x000000018107d75c TCP Conn 0x12d5fb2d0 starting SSL negotiation 13.752205 CFNetwork 0x000000018111f104 TCP Conn 0x12d5fb2d0 complete. fd: 12, err: 0 13.754004 CFNetwork 0x0000000181120630 TCP Conn 0x12d5fb2d0 event 1. err: 0 13.844813 CFNetwork 0x0000000181120708 TCP Conn 0x12d5fb2d0 started 13.890467 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e856b51) failed 13.890467 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d6a3791) failed 13.890741 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e8bdd61) failed 15.344835 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d794961) failed 17.168638 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d6eb621) failed 17.168638 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x2e827071) failed 17.168919 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e8cef41) failed 19.538093 AppleJPEG 0x000000018210ab54 [0x12e209e00] Releasing session 19.967655 AppleJPEG 0x000000018210ab54 [0x2e214e00] Releasing session 19.968163 AppleJPEG 0x000000018210ab54 [0x12e21fa00] Releasing session 19.980956 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12d76bb21) failed 19.982429 libsystem_trace.dylib 0x00000001807289cc dyld_image_header_containing_address(0x12e8c13c1) failed与SimpleAdapter

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2 个答案: