[英]Trying to get JSON with koush/ion and get a DexException
我正在使用koush / ion库,该库用于从URL获取JSON,问题是当我尝试运行我的应用程序时会抛出该错误
Error:Execution failed for task ':app:dexDebug'.
com.android.ide.common.internal.LoggedErrorException: Failed to run command:
/Applications/Android Studio.app/sdk/build-tools/android-4.4W/dx --dex --num-threads=4 --output
/Users/Ger/Desktop/Slide/app/build/intermediates/dex/debug
/Users/Ger/Desktop/Slide/app/build/intermediates/classes/debug
/Users/Ger/Desktop/Slide/app/build/intermediates/dependency-cache/debug
/Users/Ger/Desktop/Slide/app/build/intermediates/pre-dexed/debug/androidasync-1.3.8-a258b3b9f5350460cf9a1a47d3844ac30e9c5eba.jar
/Users/Ger/Desktop/Slide/app/build/intermediates/pre-dexed/debug/gson-2.2-3174cdb2bcc21df781020dd287f6d8f9b30fbcf4.jar
/Users/Ger/Desktop/Slide/app/build/intermediates/pre-dexed/debug/gson-2.3-2c927fa37b669aaa0ff9991dd7c990e2d88a7487.jar
/Users/Ger/Desktop/Slide/app/build/intermediates/pre-dexed/debug/ion-1.3.8-df2772cd07adc55daba28b3d0ce1374cf5a4edd5.jar
/Users/Ger/Desktop/Slide/app/build/intermediates/pre-dexed/debug/support-v4-18.0.0-2484d88715cbcdaf306e7f8449d6546e84c1520d.jar
Error Code:
2
Output:
UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Lcom/google/gson/JsonSerializer;
at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:594)
at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:552)
at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:533)
at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:170)
at com.android.dx.merge.DexMerger.merge(DexMerger.java:188)
at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:439)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:287)
at com.android.dx.command.dexer.Main.run(Main.java:230)
at com.android.dx.command.dexer.Main.main(Main.java:199)
at com.android.dx.command.Main.main(Main.java:103)
这是我的代码:
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.koushikdutta.async.future.FutureCallback;
import com.koushikdutta.ion.Ion;
public class NuevosEpisodios extends Activity {
String resultado = "A";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.temporada);
TextView tv = (TextView) findViewById(R.id.descripcion_temp);
Ion.with(NuevosEpisodios.this)
.load("http://example.com/thing.json")
.asJsonObject()
.setCallback(new FutureCallback<JsonObject>() {
@Override
public void onCompleted(Exception e, JsonObject result) {
// do stuff with the result or error
Gson gson = new Gson();
resultado = gson.toJson(result);
}
});
tv.setText(resultado);
}
}
我已经看到了许多解决此问题的答案,但是没有人为我工作,请帮帮我,我的lib文件夹中有gson-2.2和koush / ion jar,它们都在build gradle中编译:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v4:18.0.+'
compile 'com.koushikdutta.ion:ion:1.+'
compile files('libs/gson-2.2.jar')
}
提前致谢!
当我在测试项目中复制您的dependencies
块时,我没有收到您的错误。 我认为您的libs目录中有一个额外的jar文件,这引起了问题。 您的构建文件中的以下语句:
compile fileTree(dir: 'libs', include: ['*.jar'])
使其自动获取放置在该目录中的所有.jar文件,因此请查看是否有不需要的文件。 无论如何,使用该通配符include,此语句是多余的:
compile files('libs/gson-2.2.jar')
另外,您可以像使用com.koushikdutta.ion:ion
依赖项一样自动下载并管理GSON的jar,而不是将其手动放入您的libs目录中:
compile 'com.google.code.gson:gson:2.2'
该库的版本比2.2高。 您可能要考虑升级。 http://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22com.google.code.gson%22%20AND%20a%3A%22gson%22
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