java - 「UI残念ながら停止」と表示されます

Question

このコードにはエラーは含まれていませんが、実行すると「残念ながら停止しました」と表示されます。コードは、数の因数を見つけるためのものです。私はそれが簡単であることを知っていますが、私はアンドロイド技術に慣れていないので、助けが必要です.

public class MainActivity extends Activity {
    EditText edttxt;
    Button btn;
    int i=0 ;
    String str;
    TextView textview1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edttxt=(EditText)findViewById(R.id.editText1);
        btn=(Button)findViewById(R.id.button1);
        textview1=(TextView)findViewById(R.id.textView1);
        btn.setOnClickListener(new View.OnClickListener()  {
            @Override
            public void onClick(View arg0) {
                ArrayList<Integer> a=new ArrayList<Integer>();
                i=Integer.parseInt(edttxt.getText().toString());
                if(i==0)
                {
                    Toast.makeText(getBaseContext(), "invalid",Toast.LENGTH_SHORT).show();    
                }
                else
                {
                    for(int j=2;j<(i/2);j++)
                    {
                        if(i%j==0)
                        {
                            a.add(j);
                        }
                    }
                    int arraylistSize = a.size();
                    for(int i = 0; i < arraylistSize; i++) {
                        textview1.setText(a.get(i));
                        textview1.setText("*");
                    }
                }
            }                
        }
        );
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

logcat は次のとおりです。

08-14 21:13:31.381: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:31.381: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:32.051: W/Resources(793): Converting to string: TypedValue{t=0x12/d=0x0 a=2 r=0x7f080002}
08-14 21:13:32.281: W/Resources(793): Converting to string: TypedValue{t=0x12/d=0x0 a=2 r=0x7f080003}
08-14 21:13:32.291: W/Resources(793): Converting to string: TypedValue{t=0x12/d=0x0 a=2 r=0x7f080005}
08-14 21:13:32.492: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:32.492: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:32.711: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:32.821: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:32.951: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:32.951: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.021: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.232: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.232: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.281: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.281: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.291: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.302: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.321: D/gralloc_goldfish(793): Emulator without GPU emulation detected.
08-14 21:13:33.581: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.681: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.691: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:33.691: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.011: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.011: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.192: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.192: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.301: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.301: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.701: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.701: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.765: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:34.771: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:35.293: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:35.293: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:35.373: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:35.373: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:35.731: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:35.731: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.063: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.063: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.281: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.322: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.452: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.461: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.882: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.941: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:36.992: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:37.021: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:37.341: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:37.351: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:37.401: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:37.401: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:37.971: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:37.981: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:38.061: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:38.061: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:38.461: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:38.461: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:38.521: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:38.521: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.081: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.081: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.181: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.181: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.521: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.521: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.641: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:39.651: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.101: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.101: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.181: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.181: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.653: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.653: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.691: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:40.721: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:41.158: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:41.161: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:41.201: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:41.236: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:41.716: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:41.761: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.101: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.101: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.171: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.211: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.481: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.481: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.713: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.713: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.851: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:42.851: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.181: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.181: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.371: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.371: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.441: D/dalvikvm(793): GC_CONCURRENT freed 102K, 8% free 2670K/2892K, paused 59ms+90ms, total 759ms
08-14 21:13:43.776: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.776: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.801: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:43.801: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:44.321: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:44.332: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:44.441: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:44.441: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:44.772: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:44.792: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.225: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.225: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.284: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.284: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.714: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.714: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.851: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:45.851: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.141: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.141: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.311: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.311: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.791: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.791: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.821: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:46.821: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.301: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.301: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.331: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.331: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.641: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.641: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.881: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.881: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.951: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:47.951: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.372: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.372: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.512: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.512: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.872: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.872: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.903: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0
08-14 21:13:48.921: W/Trace(793): Unexpected value from nativeGetEnabledTags: 0

score 0 · Accepted Answer

この投稿によると、デバッグログに表示されるメッセージはエミュレーターの問題であり、フィルターで除外できます。本当の問題はまだわかりませんが、1 つの問題はコードです

int arraylistSize = a.size();
for(int i = 0; i < arraylistSize; i++) {
    textview1.setText(a.get(i));
    textview1.setText("*");
 }

おそらく次のようになります。

int arraylistSize = a.size();
StringBuffer sb = new StringBuffer();
for(int i = 0; i < arraylistSize; i++) {
    sb.append(a.get(i));
    if (i != arraylistSize -1)
    {
        sb.append("*");
    }
 }
textview1.setText(sb.toString());

テキストの値が非常に速く変更されるため、最後の「*」以外は何も表示されません。リンクに従って logcat をフィルタリングすると、おそらく null ポインター例外がどこかに表示されます。

別の提案は、次のものを置き換えることです。

i=Integer.parseInt(edttxt.getText().toString());

と：

try
{
    if (edttxt.getText() != null && edttxt.getText().toString() != null)
    {
        i=Integer.parseInt(edttxt.getText().toString());
    }
}
catch (Exception ex)
{
    Log.e("usbEffects", "Error parsing", ex);
    i=0;
}

これはコードを防御しますが、それでも失敗した理由を教えてくれます。

java - 「UI残念ながら停止」と表示されます

1 に答える 1

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