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私はAndroidの初心者です。私は私のMainActivity.javaにこの意図を持っている：私の意図がうまくいかない
Intent callLong = new Intent(MainActivity.this, LongActivity.class);
callLong.putExtra("value1",value1);
callLong.putExtra("value1",value2);
callLong.putExtra("value1",value3);
startActivity(callLong);
私は二重の値1,2および3を宣言したが、それは言う：「変数が初期化されていない可能性があります」
そして、私のLongActivity.javaで、私はこのコードを置く：
Intent callLong = getIntent();
をしかし、それは動作しません。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void submitUnit (View view) {
double value1,value2,value3;
RadioButton radioButtonInit1 = (RadioButton) findViewById(R.id.unit_init1);
assert radioButtonInit1 != null;
RadioButton radioButtonInit2 = (RadioButton) findViewById(R.id.unit_init2);
assert radioButtonInit2 != null;
RadioButton radioButtonInit3 = (RadioButton) findViewById(R.id.unit_init3);
assert radioButtonInit3 != null;
RadioButton radioButtonFinal1 = (RadioButton) findViewById(R.id.unit_final1);
assert radioButtonFinal1 != null;
RadioButton radioButtonFinal2 = (RadioButton) findViewById(R.id.unit_final2);
assert radioButtonFinal2 != null;
RadioButton radioButtonFinal3 = (RadioButton) findViewById(R.id.unit_final3);
assert radioButtonFinal3 != null;
switch (view.getId()) {
case (R.id.longitud):
radioButtonInit1.setText(R.string.long1);
radioButtonInit2.setText(R.string.long2);
radioButtonInit3.setText(R.string.long3);
radioButtonFinal1.setText(R.string.long1);
radioButtonFinal2.setText(R.string.long2);
radioButtonFinal3.setText(R.string.long3);
value1 = 100;
value2 = 39.37;
value3 = 0.3937;
break;
case (R.id.area):
radioButtonInit1.setText(R.string.area1);
radioButtonInit2.setText(R.string.area2);
radioButtonInit3.setText(R.string.area3);
radioButtonFinal1.setText(R.string.area1);
radioButtonFinal2.setText(R.string.area2);
radioButtonFinal3.setText(R.string.area3);
value1 = 10000;
value2 = 1550;
value3 = 0.155;
break;
case (R.id.volumen):
radioButtonInit1.setText(R.string.volumen1);
radioButtonInit2.setText(R.string.volumen2);
radioButtonInit3.setText(R.string.volumen3);
radioButtonFinal1.setText(R.string.volumen1);
radioButtonFinal2.setText(R.string.volumen2);
radioButtonFinal3.setText(R.string.volumen3);
value1 = 1000000;
value2 = 61023.74;
value3 = 0.061023;
break;
case (R.id.masa):
radioButtonInit1.setText(R.string.masa1);
radioButtonInit2.setText(R.string.masa2);
radioButtonInit3.setText(R.string.masa3);
radioButtonFinal1.setText(R.string.masa1);
radioButtonFinal2.setText(R.string.masa2);
radioButtonFinal3.setText(R.string.masa3);
value1 = 0.001;
value2 = 0.03527;
value3 = 35.2739;
break;
case (R.id.velocidad):
radioButtonInit1.setText(R.string.vel1);
radioButtonInit2.setText(R.string.vel2);
radioButtonInit3.setText(R.string.vel3);
radioButtonFinal1.setText(R.string.vel1);
radioButtonFinal2.setText(R.string.vel2);
radioButtonFinal3.setText(R.string.vel3);
value1 = 3.6;
value2 = 2.2369;
value3 = 0.62137;
break;
case (R.id.tiempo):
radioButtonInit1.setText(R.string.tiempo1);
radioButtonInit2.setText(R.string.tiempo2);
radioButtonInit3.setText(R.string.tiempo3);
radioButtonFinal1.setText(R.string.tiempo1);
radioButtonFinal2.setText(R.string.tiempo2);
radioButtonFinal3.setText(R.string.tiempo3);
value1 = 24;
value2 = 1440;
value3 = 60;
break;
case (R.id.fuerza):
radioButtonInit1.setText(R.string.fuerza1);
radioButtonInit2.setText(R.string.fuerza2);
radioButtonInit3.setText(R.string.fuerza3);
radioButtonFinal1.setText(R.string.fuerza1);
radioButtonFinal2.setText(R.string.fuerza2);
radioButtonFinal3.setText(R.string.fuerza3);
value1 = 0.2248;
value2 = 0.10197;
value3 = 0.453592;
break;
case (R.id.presion):
radioButtonInit1.setText(R.string.presion1);
radioButtonInit2.setText(R.string.presion2);
radioButtonInit3.setText(R.string.presion3);
radioButtonFinal1.setText(R.string.presion1);
radioButtonFinal2.setText(R.string.presion2);
radioButtonFinal3.setText(R.string.presion3);
value1 = 0.01;
value2 = 0.009865;
value3 = 0.9869;
break;
case (R.id.energia):
radioButtonInit1.setText(R.string.energia1);
radioButtonInit2.setText(R.string.energia2);
radioButtonInit3.setText(R.string.energia3);
radioButtonFinal1.setText(R.string.energia1);
radioButtonFinal2.setText(R.string.energia2);
radioButtonFinal3.setText(R.string.energia3);
value1 = 0.238845;
value2 = 0.947817;
value3 = 3.96832;
break;
case (R.id.moneda):
radioButtonInit1.setText(R.string.moneda1);
radioButtonInit2.setText(R.string.moneda2);
radioButtonInit3.setText(R.string.moneda3);
radioButtonFinal1.setText(R.string.moneda1);
radioButtonFinal2.setText(R.string.moneda2);
radioButtonFinal3.setText(R.string.moneda3);
value1 = 0.14463;
value2 = 0.126292351;
value3 = 0.87320992;
break;
}
Intent callLong = new Intent(MainActivity.this, LongActivity.class);
callLong.putExtra("value1",value1);
callLong.putExtra("value1",value2);
callLong.putExtra("value1",value3);
startActivity(callLong);
}
}
あなたにはどんなエラーメッセージがありますか？ – Masum
コード全体を入力してください。変数を初期化したが、間違っているように見えます。 –
value1、value2、value3は赤い下線付きで、 "Variable 'valuex'というメッセージは初期化されていない可能性があります。しかし、私はグローバルな範囲でダブルとラインを確立した –