Android | StartActivityForResult不会做任何事情

当我在一个新的活动中写一个国家的时候，我有家庭作业来做这件事（forresult） 它将把它写在主活动和我写的颜色中，新活动将把文本颜色改为我写的颜色。 但是“确定”和“取消”按钮不会传递搜索到的任何信息，因为没有成功

主要活动-

public class MainActivity extends Activity implements OnClickListener {
TextView tvDisplayCountry;
Random crazy;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_main);

    initsialize();

}

private void initsialize() {
    Button bAddCountry = (Button) findViewById(R.id.bAddCountry);
    bAddCountry.setOnClickListener(this);
    tvDisplayCountry = (TextView) findViewById(R.id.tvDisplayCountry);
    // ImageView ivCountryPhoto =
    // (ImageView)findViewById(r.id.ivCountryPhoto);
}

@Override
public void onClick(View v) {

    switch (v.getId()) {

    case R.id.bAddCountry:
        Intent countryactivityIntent = new Intent(MainActivity.this,
                CountryActivity.class);
        startActivityForResult(countryactivityIntent, 12);

        break;
    }

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {


    switch(resultCode){
    case 12:
        if (resultCode == Activity.RESULT_OK) {
            String Country = data.getStringExtra("country");
            String Color = data.getStringExtra("color");
            tvDisplayCountry.setText(Country);
            if (Color.equalsIgnoreCase("blue")) {
                tvDisplayCountry.setTextColor(android.graphics.Color.BLUE);
            } else if (Color.equalsIgnoreCase("yellow")) {
                tvDisplayCountry
                .setTextColor(android.graphics.Color.YELLOW);
            } else if (Color.equalsIgnoreCase("gray")) {
                tvDisplayCountry.setTextColor(android.graphics.Color.GRAY);
            } else if (Color.equalsIgnoreCase("red")) {
                tvDisplayCountry.setTextColor(android.graphics.Color.RED);
            }
            else{
                Toast.makeText(MainActivity.this, "canceld", Toast.LENGTH_SHORT).show();
            }
            break;
        }
    }

    super.onActivityResult(requestCode, resultCode, data);
}

public class CountryActivity extends Activity implements OnClickListener {
EditText etCountry, etColor;
String getCountry, getColor;
Button bOk,bCancel;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_country);



    init();


}

private void init() {
    etColor = (EditText)findViewById(R.id.etColor);
    etCountry = (EditText)findViewById(R.id.etCountry);
    bOk = (Button)findViewById(R.id.bOk);
    bCancel = (Button)findViewById(R.id.bCancel);
    bOk.setOnClickListener(this);
    bCancel.setOnClickListener(this);


}

@Override
public void onClick(View v) {

    switch (v.getId()) {
    case R.id.bOk:
        Intent myIntet = new Intent();
        getCountry = etCountry.getText().toString();
        myIntet.putExtra("country",getCountry );
        getColor = etColor.getText().toString();
        myIntet.putExtra("color", getColor);

        setResult(Activity.RESULT_OK, myIntet);
        finish();

        break;

    case R.id.bCancel:
        Intent myIntent = new Intent();

        setResult(Activity.RESULT_CANCELED, myIntent);
        finish();
        break;
    }

}

}

乡村活动-

public class MainActivity extends Activity implements OnClickListener {
TextView tvDisplayCountry;
Random crazy;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_main);

    initsialize();

}

private void initsialize() {
    Button bAddCountry = (Button) findViewById(R.id.bAddCountry);
    bAddCountry.setOnClickListener(this);
    tvDisplayCountry = (TextView) findViewById(R.id.tvDisplayCountry);
    // ImageView ivCountryPhoto =
    // (ImageView)findViewById(r.id.ivCountryPhoto);
}

@Override
public void onClick(View v) {

    switch (v.getId()) {

    case R.id.bAddCountry:
        Intent countryactivityIntent = new Intent(MainActivity.this,
                CountryActivity.class);
        startActivityForResult(countryactivityIntent, 12);

        break;
    }

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {


    switch(resultCode){
    case 12:
        if (resultCode == Activity.RESULT_OK) {
            String Country = data.getStringExtra("country");
            String Color = data.getStringExtra("color");
            tvDisplayCountry.setText(Country);
            if (Color.equalsIgnoreCase("blue")) {
                tvDisplayCountry.setTextColor(android.graphics.Color.BLUE);
            } else if (Color.equalsIgnoreCase("yellow")) {
                tvDisplayCountry
                .setTextColor(android.graphics.Color.YELLOW);
            } else if (Color.equalsIgnoreCase("gray")) {
                tvDisplayCountry.setTextColor(android.graphics.Color.GRAY);
            } else if (Color.equalsIgnoreCase("red")) {
                tvDisplayCountry.setTextColor(android.graphics.Color.RED);
            }
            else{
                Toast.makeText(MainActivity.this, "canceld", Toast.LENGTH_SHORT).show();
            }
            break;
        }
    }

    super.onActivityResult(requestCode, resultCode, data);
}

public class CountryActivity extends Activity implements OnClickListener {
EditText etCountry, etColor;
String getCountry, getColor;
Button bOk,bCancel;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_country);



    init();


}

private void init() {
    etColor = (EditText)findViewById(R.id.etColor);
    etCountry = (EditText)findViewById(R.id.etCountry);
    bOk = (Button)findViewById(R.id.bOk);
    bCancel = (Button)findViewById(R.id.bCancel);
    bOk.setOnClickListener(this);
    bCancel.setOnClickListener(this);


}

@Override
public void onClick(View v) {

    switch (v.getId()) {
    case R.id.bOk:
        Intent myIntet = new Intent();
        getCountry = etCountry.getText().toString();
        myIntet.putExtra("country",getCountry );
        getColor = etColor.getText().toString();
        myIntet.putExtra("color", getColor);

        setResult(Activity.RESULT_OK, myIntet);
        finish();

        break;

    case R.id.bCancel:
        Intent myIntent = new Intent();

        setResult(Activity.RESULT_CANCELED, myIntent);
        finish();
        break;
    }

}

---

您的

onActivityResult

中有一个错误——您打开

resultCode

（它将是

RESULT\u OK

或

RESULT\u cancelled

，而不是

12

）

---

只需将

开关（resultCode）

更改为

开关（requestCode）

您在LogCat中是否遇到任何错误？请在代码中添加一些Log.i（“，“有用的东西”），并检查哪里有问题。我们无法测试您的全部代码！在日志猫没有问题推或取消，主要活动打开没有变化你也应该考虑遵循。“Color”和“Country”变量是大写的，通常为类和接口保留。变量名应为小写。Android（和Java AWT）有一个Color类，您的代码看起来像是在试图访问该类的静态equalsIgnoreCase（）方法。